new latex package tabu (12nov10)

git-svn-id: svn://tug.org/texlive/trunk@20421 c570f23f-e606-0410-a88d-b1316a301751

9 files changed, 4873 insertions, 1 deletions

diff --git a/Master/texmf-dist/doc/latex/tabu/README b/Master/texmf-dist/doc/latex/tabu/README
new file mode 100644
index 00000000000..e3a81270baa
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/tabu/README
@@ -0,0 +1,38 @@
++---------------------------------------------------------+
+|            tabu - Flexible LaTeX tabulars               |
++---------------------------------------------------------+
+
+tabu provides a single environment:          tabu
+designed to make all kind of tabulars provided that they do
+not split accross pages.
+
+tabu is based on array.sty and requires no other package.
+tabu does not modify array.sty nor the classes of tokens.
+
+tabu can be used in place of tabular, tabular* and tabularx
+X columns in tabu can be specified with a width coefficient
+the alignement (l,r,c,j) the column type (p,m,b) or even $.
+
+tabu also works in math mode and its name remains tabu.
+tabu can contain any type of tabular, array, tabularx
+tabu can be put inside tabular, array, tabularx, tabular*
+
+\begin{tabu} is like tabular if the preamble has no X column
+\begin{tabu} to <dimen>      specifies the target width
+\begin{tabu} spread <dimen>  enlarge the natural width
+
+tabu with X columns has a default target if not specified
+(usefull for nested tabus + compatibility with \linegoal)
+
+tabu provides facilities to change the font and the alignment
+in one row (\rowfont), save and restore the preamble and the
+tabular parameters (\savetabu, \usetabu).
+
+tabu provides other facilities to align numbers in X columns
+draw lines with color, dashed or even leaders. Those facilities
+are provided for convenience: they work as long as the tabu
+preamble does not contain "too special tokens".
+
+tabu has been tested successfully with many packages related
+to tabulars, cells, alignment...
+
diff --git a/Master/texmf-dist/doc/latex/tabu/tabu.pdf b/Master/texmf-dist/doc/latex/tabu/tabu.pdf
new file mode 100644
index 00000000000..79180f4bc06
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/tabu/tabu.pdf
diff --git a/Master/texmf-dist/source/latex/tabu/tabu.drv b/Master/texmf-dist/source/latex/tabu/tabu.drv
new file mode 100644
index 00000000000..403bd0672c8
--- /dev/null
+++ b/Master/texmf-dist/source/latex/tabu/tabu.drv
@@ -0,0 +1,79 @@
+%%
+%% This is file `tabu.drv',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% tabu.dtx  (with options: `driver')
+%% 
+%% This is a generated file.
+%% 
+%% tabu : 2010/10/27 v1.1 - tabu : Flexible LaTeX tabulars
+%% 
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either
+%% version 1.3 of this license or (at your option) any later
+%% version. The latest version of this license is in
+%%    http://www.latex-project.org/lppl.txt
+%% 
+%% This work consists of the main source file tabu.dtx
+%% and the derived files
+%%    tabu.sty, tabu.pdf, tabu.ins
+%% 
+%% tabu : Flexible LaTeX tabulars
+%% Copyright (C) 2010 by Florent Chervet <florent.chervet@free.fr>
+%% 
+\edef\thisfile{\jobname}
+\def\thisinfo{Flexible \LaTeX{} tabulars (\FC)}
+\def\thisdate{2010/10/28}
+\def\thisversion{1.1}
+\def\CTANbaseurl{http://www.ctan.org/tex-archive/macros/latex}
+\def\CTANdisplay{CTAN:macros/latex}
+\makeatletter\protected\def\CTANhref{\@ifstar\CTANhrefstar\CTANhrefnost}\makeatother
+\newcommand*\CTANhrefstar[3][/contrib/]{\href{\CTANbaseurl#1#2}{#3}}
+\newcommand*\CTANhrefnost[2][/contrib/]{\href{\CTANbaseurl#1#2}{\nolinkurl{\CTANdisplay#1#2}}}
+\let\loadclass\LoadClass
+\def\LoadClass#1{\loadclass[abstracton]{scrartcl}\let\scrmaketitle\maketitle\AtEndOfClass{\let\maketitle\scrmaketitle}}
+\PassOptionsToPackage{svgnames}{xcolor}
+\documentclass[a4paper,oneside]{ltxdoc}
+\AtBeginDocument{\DeleteShortVerb{\|}}
+\usepackage[latin1]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{etoolbox,geometry,graphicx,xcolor,lastpage,lmodern,bbding,hologo,relsize,moresize,manfnt,xspace,numprint}
+\usepackage[official]{eurosym}
+\usepackage[expansion=all,stretch=20,shrink=60]{microtype}
+\usepackage{tocloft,titlesec,hypbmsec,fancyhdr,enumitem,multirow,makecell,tabularx,booktabs,delarray,ragged2e,colortbl,marginnote,shapepar}
+\heavyrulewidth=.7pt
+\usepackage{holtxdoc,bookmark}
+\usepackage{interfaces}[2010/10/31]
+\usetikz{basic,chains,positioning}
+\usepackage{embedfile}
+\RequirePackage{amsopn,amsmath}% \DeclareMathOperator
+\RequirePackage[a]{esvect}% for vectors
+\DeclareMathOperator*\Div{div}
+\DeclareMathOperator*\Rot{\vv{\text{rot}}}
+\newrobustcmd*\dpartial[2]{\displaystyle\genfrac{}{}{}{}{\partial#1}{\partial#2}}
+\usepackage{expl3,l3keys2e,siunitx}
+\usepackage{xfrac}
+\csname endofdump\endcsname
+\CodelineNumbered
+\usepackage{fancyvrb}\fvset{gobble=1,listparameters={\topsep=0pt}}
+\usepackage[linegoal,debugshow]{tabu}
+\lastlinefit999
+\geometry{top=0pt,includeheadfoot,headheight=.6cm,headsep=.6cm,bottom=.6cm,footskip=.5cm,left=4cm,right=1.5cm}
+\hypersetup{%
+  pdftitle={tabu},
+  pdfsubject={a simple line parser for TeX},
+  pdfauthor={Florent CHERVET},
+  colorlinks,linkcolor=reflink,
+  pdfstartview={FitH},%pdfpagemode=UseOutLines,
+  pdfkeywords={tex, e-tex, latex, package, tabular, array, halign, tabularx, longtable, color, colortbl, alignment},
+  }
+\embedfile{\thisfile.dtx}
+\begin{document}
+   \DocInput{\thisfile.dtx}
+\end{document}
+
+\endinput
+%%
+%% End of file `tabu.drv'.
diff --git a/Master/texmf-dist/source/latex/tabu/tabu.dtx b/Master/texmf-dist/source/latex/tabu/tabu.dtx
new file mode 100644
index 00000000000..cb70b0226da
--- /dev/null
+++ b/Master/texmf-dist/source/latex/tabu/tabu.dtx
@@ -0,0 +1,3520 @@
+% \iffalse meta-comment
+% tabu : 2010/10/27 v1.1 - tabu: flexible LaTeX tabulars]
+%
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either
+% version 1.3 of this license or (at your option) any later
+% version. The latest version of this license is in
+%    http://www.latex-project.org/lppl.txt
+%
+% This work consists of the main source file tabu.dtx
+% and the derived files
+%    tabu.sty, tabu.pdf, tabu.ins
+%
+% Unpacking:
+%    (a) If tabu.ins is present:
+%           etex tabu.ins
+%    (b) Without tabu.ins:
+%           etex tabu.dtx
+%    (c) If you insist on using LaTeX
+%           latex \let\install=y\input{tabu.dtx}
+%        (quote the arguments according to the demands of your shell)
+%
+% Documentation:
+%           (pdf)latex tabu.dtx
+% Copyright (C) 2010 by Florent Chervet <florent.chervet@free.fr>
+%<*ignore>
+\begingroup
+  \def\x{LaTeX2e}%
+\expandafter\endgroup
+\ifcase 0\ifx\install y1\fi\expandafter
+         \ifx\csname processbatchFile\endcsname\relax\else1\fi
+         \ifx\fmtname\x\else 1\fi\relax
+\else\csname fi\endcsname
+%</ignore>
+%<*install>
+\input docstrip.tex
+\Msg{************************************************************************}
+\Msg{* Installation}
+\Msg{* Package: 2010/10/27 v1.1 - tabu: Flexible LaTeX tabulars}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+This is a generated file.
+
+tabu : 2010/10/27 v1.1 - tabu : Flexible LaTeX tabulars
+
+This work may be distributed and/or modified under the
+conditions of the LaTeX Project Public License, either
+version 1.3 of this license or (at your option) any later
+version. The latest version of this license is in
+   http://www.latex-project.org/lppl.txt
+
+This work consists of the main source file tabu.dtx
+and the derived files
+   tabu.sty, tabu.pdf, tabu.ins
+
+tabu : Flexible LaTeX tabulars
+Copyright (C) 2010 by Florent Chervet <florent.chervet@free.fr>
+
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+
+\generate{%
+   \file{tabu.ins}{\from{tabu.dtx}{install}}%
+   \file{tabu.sty}{\from{tabu.dtx}{package}}%
+}
+
+\askforoverwritefalse
+\generate{%
+   \file{tabu.drv}{\from{tabu.dtx}{driver}}%
+}
+
+\obeyspaces
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{*     tabu.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `tabu.dtx'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+%</install>
+%<*ignore>
+\fi
+%</ignore>
+%<*driver>
+\edef\thisfile{\jobname}
+\def\thisinfo{Flexible \LaTeX{} tabulars (\FC)}
+\def\thisdate{2010/10/28}
+\def\thisversion{1.1}
+\def\CTANbaseurl{http://www.ctan.org/tex-archive/macros/latex}
+\def\CTANdisplay{CTAN:macros/latex}
+\makeatletter\protected\def\CTANhref{\@ifstar\CTANhrefstar\CTANhrefnost}\makeatother
+\newcommand*\CTANhrefstar[3][/contrib/]{\href{\CTANbaseurl#1#2}{#3}}
+\newcommand*\CTANhrefnost[2][/contrib/]{\href{\CTANbaseurl#1#2}{\nolinkurl{\CTANdisplay#1#2}}}
+\let\loadclass\LoadClass
+\def\LoadClass#1{\loadclass[abstracton]{scrartcl}\let\scrmaketitle\maketitle\AtEndOfClass{\let\maketitle\scrmaketitle}}
+\PassOptionsToPackage{svgnames}{xcolor}
+\documentclass[a4paper,oneside]{ltxdoc}
+\AtBeginDocument{\DeleteShortVerb{\|}}
+\usepackage[latin1]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{etoolbox,geometry,graphicx,xcolor,lastpage,lmodern,bbding,hologo,relsize,moresize,manfnt,xspace,numprint}
+\usepackage[official]{eurosym}
+\usepackage[expansion=all,stretch=20,shrink=60]{microtype}
+\usepackage{tocloft,titlesec,hypbmsec,fancyhdr,enumitem,multirow,makecell,tabularx,booktabs,delarray,ragged2e,colortbl,marginnote,shapepar}
+\heavyrulewidth=.7pt
+\usepackage{holtxdoc,bookmark}
+\usepackage{interfaces}[2010/10/31]
+\usetikz{basic,chains,positioning}
+\usepackage{embedfile}
+\RequirePackage{amsopn,amsmath}% \DeclareMathOperator
+\RequirePackage[a]{esvect}% for vectors
+\DeclareMathOperator*\Div{div}
+\DeclareMathOperator*\Rot{\vv{\text{rot}}}
+\newrobustcmd*\dpartial[2]{\displaystyle\genfrac{}{}{}{}{\partial#1}{\partial#2}}
+\usepackage{expl3,l3keys2e,siunitx}
+\usepackage{xfrac}
+\csname endofdump\endcsname
+\CodelineNumbered
+%\OnlyDescription
+\usepackage{fancyvrb}\fvset{gobble=1,listparameters={\topsep=0pt}}
+\usepackage[linegoal,debugshow]{tabu}
+\lastlinefit999
+\geometry{top=0pt,includeheadfoot,headheight=.6cm,headsep=.6cm,bottom=.6cm,footskip=.5cm,left=4cm,right=1.5cm}
+\hypersetup{%
+  pdftitle={tabu},
+  pdfsubject={a simple line parser for TeX},
+  pdfauthor={Florent CHERVET},
+  colorlinks,linkcolor=reflink,
+  pdfstartview={FitH},%pdfpagemode=UseOutLines,
+  pdfkeywords={tex, e-tex, latex, package, tabular, array, halign, tabularx, longtable, color, colortbl, alignment},
+  }
+\embedfile{\thisfile.dtx}
+\begin{document}
+   \DocInput{\thisfile.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \CheckSum{3457}
+%
+% \CharacterTable
+%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%   Digits        \0\1\2\3\4\5\6\7\8\9
+%   Exclamation   \!     Double quote  \"     Hash (number) \#
+%   Dollar        \$     Percent       \%     Ampersand     \&
+%   Acute accent  \'     Left paren    \(     Right paren   \)
+%   Asterisk      \*     Plus          \+     Comma         \,
+%   Minus         \-     Point         \.     Solidus       \/
+%   Colon         \:     Semicolon     \;     Less than     \<
+%   Equals        \=     Greater than  \>     Question mark \?
+%   Commercial at \@     Left bracket  \[     Backslash     \\
+%   Right bracket \]     Circumflex    \^     Underscore    \_
+%   Grave accent  \`     Left brace    \{     Vertical bar  \|
+%   Right brace   \}     Tilde         \~}
+%
+% \DoNotIndex{\begin,\CodelineIndex,\CodelineNumbered,\def,\DisableCrossrefs,\~,\@ifpackagelater,\z@,\@ne,\@@}
+% \DoNotIndex{\DocInput,\documentclass,\EnableCrossrefs,\end,\GetFileInfo}
+% \DoNotIndex{\NeedsTeXFormat,\OnlyDescription,\RecordChanges,\usepackage}
+% \DoNotIndex{\ProvidesClass,\ProvidesPackage,\ProvidesFile,\RequirePackage}
+% \DoNotIndex{\filename,\fileversion,\filedate,\let}
+% \DoNotIndex{\@listctr,\@nameuse,\csname,\else,\endcsname,\expandafter}
+% \DoNotIndex{\gdef,\global,\if,\item,\newcommand,\nobibliography,\newrobustcmd,\renewrobustcmd,\providerobustcmd}
+% \DoNotIndex{\par,\providecommand,\relax,\renewcommand,\renewenvironment}
+% \DoNotIndex{\stepcounter,\usecounter,\nocite,\fi}
+% \DoNotIndex{\@fileswfalse,\@gobble,\@ifstar,\@unexpandable@protect}
+% \DoNotIndex{\AtBeginDocument,\AtEndDocument,\begingroup,\endgroup}
+% \DoNotIndex{\frenchspacing,\MessageBreak,\newif,\PackageWarningNoLine,\@addtopreamble,\@depth,\@height,\@width,\@firstofone,\@frameb@x,\@lastchclass,\@M,\m,\@nextchar,\@startpbox}
+% \DoNotIndex{\protect,\string,\xdef,\ifx,\texttt,\@biblabel,\bibitem,\@tempa,\{,\},\^,\ ,\DeclareOption,\CT@end,\CT@arc@,\count@,\col@sep,\endgraf,\dimexpr,\fbox,\fboxsep,\g@addto@macro}
+% \DoNotIndex{\z@,\wd,\vrule,\voidb@x,\verb,\bibitem,\NC@rewrite@,\NC@list,\NC@do,\NC@,\nobreak,\number,\showbox,\tabu@AtEnd,\tabu@getnbc@ls,\tabu@s@nitizetext}
+% \DoNotIndex{\FrameCommand,\MakeFramed,\FrameRestore,\hskip,\hfil,\hfill,\hsize,\hspace,\hss,\hbox,\hb@xt@,\endMakeFramed,\escapechar,\tabu@s@veX,\tabu@sett@rget,\tabu@stack}
+% \DoNotIndex{\do,\date,\if@tempswa,\@tempdima,\@tempboxa,\@tempswatrue,\@tempswafalse,\ifdefined,\ifhmode,\ifmmode,\cr}
+% \DoNotIndex{\box,\author,\advance,\multiply,\Command,\outer,\next,\leavevmode,\kern,\title,\toks@,\trcg@where,\tt}
+% \DoNotIndex{\the,\width,\star,\space,\section,\subsection,\textasteriskcentered,\textwidth,\stform}
+% \DoNotIndex{\",\:,\@empty,\@for,\@gtempa,\@latex@error,\@namedef,\@nameuse,\@tempa,\@testopt,\@width,\\,\m@ne,\makeatletter,\makeatother}
+% \DoNotIndex{\maketitle,\parindent,\x,\kernel@ifnextchar}
+% \DoNotIndex{\DefineShortVerb,\DeleteShortVerb,\UndefineShortVerb,\MakeShortVerb,\endinput,\@eha,\@ehd,\@nil,\@nnil,\@ifundefined,\@ifpackagelater,\@ifpackageloaded}
+% \DoNotIndex{\p@,\tracingtabu,\@ne,\tw@,\m@ne,\z@skip}
+% \makeatletter
+% \newrobustcmd\ClearPage{\@ifstar\clearpage{}}
+% \makeatletter
+% \catcode`\§ \active   \def§{\@ifnextchar §{\par\nobreak\vskip-2\parskip}{\par\nobreak\vskip-\parskip}}
+% \def\thispackage{\xpackage{{\pkgcolor\thisfile}}\xspace}
+% \def\ThisPackage{\Xpackage{\thisfile}\xspace}
+% \def\Xpackage{\@dblarg\X@package}
+% \def\X@package[#1]#2{\@testopt{\X@@package{#1}{#2}}{}}
+% \def\X@@package#1#2[#3]{\xpackage{#2\footnote{\noindent\xpackage{#2}: \CTANhref{#1}#3}}}
+% \def\Underbrace#1_#2{$\underbrace{\vtop to2ex{}\hbox{#1}}_{\footnotesize\hbox{#2}}$}
+%\def\FV@DefineCommandChars #1#2#3{%
+%   \edef\FV@restoreCommandChars{%
+%      \catcode`#1\the\catcode`#1\relax
+%      \catcode`#2\the\catcode`#2\relax
+%      \catcode`#3\the\catcode`#3\relax}%
+%   \def \FV@CommandChars {\catcode `#1=0\relax \catcode `#2=1\relax \catcode `#3=2\relax }%
+%   \output\expandafter{\expandafter\FV@restoreCommandChars\the\output}%
+%}
+% \parindent\z@\parskip.4\baselineskip\topsep\parskip\partopsep\z@\leftmargini=2.5cm
+% \widowpenalty=5000\clubpenalty=8000
+% \newrobustcmd*\macrocodecolor{\color{macrocode}}\definecolor{macrocode}{rgb}{0.05,0.02,0.07}
+% \def\macro@font{\changefont{fam=lmtt,size-=1pt,color=macrocode,spread=1}\let\AltMacroFont\macro@font}
+% \def\MacroFont{\changefont{fam=lmtt,color=macrocode}}
+% \g@addto@macro\@list@extra{\parsep\parskip\topsep\z@\itemsep\z@}
+% \def\texorpdf#1#2{\texorpdfstring{#1{#2}}{#2}}
+% \def\textitbf#1{\textbf{\itshape#1}}\let\textbfit\textitbf
+% \DefineVerbatimEnvironment{VerbLines}{Verbatim}{gobble=1,frame=lines,framesep=6pt,fontfamily=\ttdefault,fontseries=m}
+% \DefineVerbatimEnvironment{VerbLines*}{Verbatim}{gobble=1,frame=lines,framesep=6pt,fontfamily=\ttdefault,fontseries=m,commandchars=$()}
+% \DefineVerbatimEnvironment{Verb}{Verbatim}{gobble=1,fontfamily=\ttdefault,fontseries=m}
+% \DefineVerbatimEnvironment{Verb*}{Verbatim}{gobble=1,fontfamily=\ttdefault,fontseries=m,commandchars=$()}
+% \def\smex{\leavevmode\hb@xt@2em{\hfil$\longrightarrow$\hfil}}
+% \def\ttdefault{lmvtt}
+% \renewrobustcmd\#[1]{{\usefont{T1}{pcr}{bx}{n}\char`\##1}}
+% \renewrobustcmd*\cs[2][]{\mbox{\ttfamily#1\expandafter\@gobble\string\\#2}}
+% \newrobustcmd*\csbf[2][]{\textbf{\cs[{#1}]{#2}}}
+% \newrobustcmd\textttbf[1]{\textbf{\texttt{#1}}}
+% \newrobustcmd*\blue{\color{blue}}\newcommand*\red{\color{dr}}\newcommand*\green{\color{green}}\newcommand\rred{\color{red}}
+% \newrobustcmd*\FC[1][\color{copper}]{{#1\usefont{T1}{fts}xn FC}}
+% \colorlet{pkgcolor}{teal} \def\pkgcolor{\color{pkgcolor}}
+% \definecolor{copper}{rgb}{0.67,0.33,0.00}  \newcommand\copper{\color{copper}}
+% \definecolor{dg}{rgb}{0.02,0.29,0.00}      \newcommand\dg{\color{dg}}
+% \definecolor{db}{rgb}{0,0,0.502}           \newcommand\db{\color{db}}
+% \definecolor{dr}{rgb}{0.75,0.00,0.00}      \let\dr\red
+% \definecolor{lk}{rgb}{0.25,0.25,0.25}      \newrobustcmd\lk{\color{lk}}
+% \definecolor{llk}{rgb}{0.40,0.40,0.40}
+% \newrobustcmd\bk{\color{black}}\newcommand\md{\mdseries}
+% \newrobustcmd\ie{\emph{ie.}}
+% \newcommand\textt[1]{\texorpdf\texttt{#1}}
+% \newrobustcmd\texttbf[2][]{\texttt{\bfseries#1#2}}
+% \newcommand\cellstrut{}\let\cellstrut\bottopstrut
+% \newrobustcmd\etc{{\bk\emph{etc.}}}
+% \def\M{\@ifstar{\M@i\@firstofone}{\M@i\meta}}
+% \def\M@i#1{\@ifnextchar[^^A]
+%   {\M@square#1}
+%   {\@ifnextchar(^^A)
+%     {\M@paren#1}
+%     {\M@brace#1}}^^A
+% }
+% \def\M@square#1[#2]{\M@Bracket[{#1{#2}}]}
+% \def\M@paren#1(#2){\M@Bracket({#1{#2}})}
+% \def\M@brace#1#2{\M@Bracket\{{#1{#2}}\}}
+% \def\M@Bracket#1#2#3{{\ttfamily#1#2#3}}
+% \newrobustcmd*\thisyear{\begingroup
+%    \def\thisyear##1/##2\@nil{\endgroup
+%       \oldstylenums{##1\ifnum##1=\year\else\,\textendash\,\the\year\fi}%
+%    }\expandafter\thisyear\thisdate\@nil
+% }
+% \renewrobustcmd\declcs[2][]{^^A
+%   \par\addvspace\parskip^^A{.5ex plus 1ex}\noindent
+%   \goodbreak
+%   \noindent\larger\changefont{spread=1}^^A
+%   \hspace{-\leftmargini}^^A
+%   \def\*{\unskip\,\texttt{*}}^^A
+%   \begin{tabular}{|l|}^^A
+%     \hline
+%     \expandafter\SpecialUsageIndex\csname #2\endcsname
+%     \raisedhyperdef[8pt]{declcs}{#2}{\cs[{#1}]{#2}}^^A
+% }^^A
+% \renewcommand\enddeclcs{%
+%     \crcr \hline
+%     \end{tabular}%
+%     \nobreak   \par  \nobreak
+%     \noindent
+%     \ignorespacesafterend
+%  }
+% \def\declmargin{\hspace*{\dimexpr-\leftmargini+\arrayrulewidth+\tabcolsep}}
+% \pretocmd\textasteriskcentered{\usefont{OMS}{cmsy}mn}{}{}
+% \bookmarksetup{open=true,openlevel=3}
+% \pagesetup{%
+%  head/rule/width=.0pt,
+%  left/offset=3cm,foot/left/offset+=.5cm,right/offset=1cm,
+%  head/font=\scriptsize,
+%  head/color=LightSteelBlue,
+%  head/left=\moveleft1cm\vbox to\z@{\vss\setbox0=\null\ht0=\z@\wd0=\paperwidth\dp0=\headheight\rlap{\colorbox{GhostWhite}{\box0}}}\vskip-\headheight\thispackage,
+%  head/right=Flexible \LaTeX{} tabulars,
+%  foot/font=\lk\scriptsize,
+%  foot/left=\vbox to\baselineskip{\vss{{\rotatebox[origin=l]{90}{\thispackage\,[rev.\thisversion]\,\copyright\,\thisyear\,\lower.4ex\hbox{\pkgcolor\NibRight}\,\FC}}}},
+%  foot/right=\oldstylenums{\arabic{page}} / \oldstylenums{\pageref{LastPage}}%
+%  }
+% \pagesetup[plain]{%
+%  norules,font=\scriptsize,
+%  foot/right=\oldstylenums{\arabic{page}} / \oldstylenums{\pageref{LastPage}},
+%  left/offset=3cm,foot/left/offset+=.5cm,right/offset=1cm,
+%  foot/left=\vbox to\baselineskip{\vss{{\rotatebox[origin=l]{90}{\thispackage\,[rev.\thisversion]\,\copyright\,\thisyear\,\lower.4ex\hbox{\pkgcolor\NibRight}\,\FC\quad \xemail{florent.chervet at free.fr}}}}},
+% }
+% \pagestyle{fancy}
+% \sectionformat\section{
+%        mark=\marksthe{section}{#1},
+%        left=\dimexpr-\leftmargini+\arrayrulewidth+\tabcolsep\relax,
+%        top=\medskipamount,
+%        bottom=\smallskipamount,
+%        font=\normalfont\Large\bfseries,
+%        bookmark={bold,color=[rgb]{0.02,0.05,.2}},
+%        break=\goodbreak}
+% \sectionformat\subsection{%
+%     top=\medskipamount,
+%     bottom=.5\smallskipamount,
+%     bookmark={color=[rgb]{0.02,0.05,.1}},
+%     font=\normalfont\Large\bfseries,
+%     break=\addpenalty{-\@highpenalty}}
+% \sectionformat\subsubsection{
+%     bookmark={italic=false,color=lk},
+%     font=\normalfont\large\bfseries\lk,
+%     label=,
+%     top=\medskipamount,
+%     bottom=.5\smallskipamount,
+%     break=\addpenalty{-\@medpenalty}}
+% \setitemize{itemsep=\parskip,topsep=0pt,labelsep=1em,parsep=0pt}
+% \tikzset{every picture/.add style={}{/utils/exec=\changefont{spread=1}}}
+% \newrobustcmd*\IMPLEMENTATION{%
+%     \newgeometry{top=0.8cm,headheight=.5cm,headsep=.3cm,bottom=1.2cm,footskip=.5cm,left=5cm,right=.50cm}
+%     \pagesetup*{
+%        left/offset+=1cm,right/offset-=1cm,
+%        head/color=Lavender,
+%        head/left=\moveleft1cm\vbox to\z@{\vss\setbox0=\null\ht0=\z@\wd0=\paperwidth\dp0=\headheight\rlap{\colorbox{GhostWhite}{\box0}}}\vskip-\headheight t\,a\,b\,u\,\ \ i\,m\,p\,l\,e\,m\,e\,n\,t\,a\,t\,i\,o\,n,
+%      }%
+%     \clearpage
+%     ^^A\tocsetup{depth-=1}
+%     \sectionformat\section{bookmark/color=black}\sectionformat\subsection{bookmark/color=black}
+%     \bookmarksetup{bold*,openlevel=3}
+%     \section(Implementation)[\mdseries\scshape\pmb{Implementation}]{Implementation} \label{sec:implementation}}
+% \let\plainllap\llap
+% \newrobustcmd\macro@llap[1]{\global\let\llap\plainllap\setbox0\hbox{#1}^^A
+%  \ifdim\wd0>4cm\hbox to\z@{\hss\hbox to4cm{#1\hss}}^^A
+%        \edef\@tempa{\the\everypar\hskip\dimexpr\the\wd0-4cm\relax\global\everypar{}}%
+%            \global\everypar\expandafter{\@tempa}^^A
+%  \else\hbox to\z@{\hss#1}\fi
+%  \setbox\z@\box\voidb@x}
+% \pretocmd\macro{\MacrocodeTopsep=\z@skip\MacroTopsep\z@skip\let\llap\macro@llap\parsep=\z@\topsep=\z@\itemsep=\z@\partopsep\z@}{}{}
+% \apptocmd\endmacro{\goodbreak\vskip.3\parskip}{}{}
+%
+% \definecolor{reflink}{rgb}{0.95,0.00,0.05}
+% \definecolor{reflink}{rgb}{0.05,0.00,0.95}
+% \newrobustcmd\stform{\@ifnextchar*{\@stform[]\textasteriskcentered\@gobble}\@stform}
+% \newrobustcmd\@stform[2][\string]{\textttbf{#1#2}\xspace}
+%
+% \makeatother
+%
+%
+% \deffootnote{1em}{0pt}{\rlap{\textsuperscript{\thefootnotemark}}\kern1em}
+%
+% \title{\vspace*{-28pt}\mdseries {\HUGE\bfseries\sffamily t\,a\,b\,u\,}}
+% \date{}
+% \author{\small\thisdate~--~version \thisversion}
+% \subtitle{\LARGE Flexible \LaTeX{} tabulars\endgraf {\small\FC}}
+% \maketitle
+%
+%
+%
+% \makeatletter\begingroup\let\@thefnmark\@empty\let\@makefntext\@firstofone
+% \footnotetext{\noindent\parskip=0pt\scriptsize
+% This documentation is produced with the +DocStrip+ utility. Package \xpackage{tabu} is used with the \textt{linegoal} option.\topsep=0pt
+% \begin{tabbing}
+% \qquad\=\smex\=To get the documentation, \= run (thrice):\quad\= \texttt{pdflatex \thisfile.dtx} \\
+% \qquad\>\>To get the index, \> run:\>\texttt{makeindex -s gind.ist \thisfile.idx} \\
+% \>\smex\>To get the package, \> run:\>        \texttt{etex \thisfile.dtx}
+% \end{tabbing}§
+% The \xext{dtx} file is embedded into this pdf file thank to \xpackage{embedfile} by H. Oberdiek.}
+% \endgroup\makeatother
+%
+% \deffootnote{1em}{0pt}{\rlap{\thefootnotemark.}\kern1em}
+%
+% {\let\quotation\relax\vspace*{-1cm}%
+% \begin{abstract}\parskip\medskipamount\parindent0pt\lastlinefit0\leftskip1cm\rightskip\leftskip
+%
+% This package defines a single environment \textt{tabu} to make all kinds of tabulars in text or in math mode
+% provided that they do not split across pages.
+%
+% \textt{tabu} is more flexible that \textt{tabular}, \textt{tabular*}, \textt{tabularx}
+% and \textt{array} and extend the possibilities. All tabulars in this document were made
+% with the \textt{tabu} environment. Last (but not least) \textt{tabu} is more than compatible
+% with any package that provide commands to format tabulars.
+% Indeed, \thispackage{} \textbf{does not modify any of the macros of \xfile{array.sty}.} All
+% functionalities are obtained with only two modifications\footnote{\cs{prepnext@tok} and \cs{save@decl}.
+% See ``\nameref{sec:light package option}''.} which are loaded only inside
+% a \textt{tabu} environment.
+%
+% \xpackage{tabu} requires \eTeX, the standard package \xfile{array.sty} and no other package.
+%
+% \end{abstract}}
+%
+% \makeatletter
+% \tocsetup{
+% dot=$\scriptscriptstyle\ldotp$,
+% dotsep=1mu,
+% title/bottom=6pt,
+% title=Contents\quad\leaders\vrule height3.1pt depth-3pt\hfill\null,
+% bookmark={text=Contents,bold},
+% after=\leavevmode\hrule height3.1pt depth-3pt,
+% twocolumns=false,
+% section/skip=4pt plus2pt minus2pt,
+% section/leaders=\leaders\hbox{$\m@th\mkern1mu\hbox{$\mathbf\ldotp$}\mkern1mu$}\hfill,
+% section/dotsep,
+% subsection/skip=0pt plus2pt minus 2pt,
+% subsubsection/font=\slshape,
+% subsubsection/pagenumbers=off,
+% subsubsection/skip-=1pt,subsubsection/numwidth-=4pt,
+% }\makeatother
+%
+% {%
+%  \hypersetup{linkcolor=black}
+%  \tableofcontents
+% }
+%
+% \clearpage
+% \changefont{spread*=1.1}
+%
+% \bottomtitles=.3\textwidth
+% \section{The \textt{tabu} environment}
+% \label{sec.tabu}
+%
+% \subsection(tabu, tabu to, tabu spread){\textt{tabu}, \textt{tabu to} and \textt{tabu spread}}
+%
+% {\let\red\relax
+% \begin{declcs}{begin}\M*{\red tabu}\M[pos]\M{tabular preamble} \\
+% \cs{begin}\M*{{\red tabu}} to \meta{dimen}\M[pos]\M{tabular preamble} \\
+% \cs{begin}\M*{{\red tabu}} spread \meta{dimen}\M[pos]\M{tabular preamble} \\
+% \end{declcs}}
+%
+% The \textt{tabu} environment behaves exactly like \textt{tabular}: the preamble
+% is parsed by the macros in \xfile{array.sty} with no modification in the characters classes.
+%  \textt{tabu} improves \textt{tabular} and \textt{array}:
+%  \begin{itemize}
+%  \item footnotes and index words are allowed inside \textt{tabu}
+%  \item \textt X columns are also allowed, with an \emph{optional} parameter for the width-coefficient,
+%        the alignment (\textt{l,r,c} or \textt{L,R,C} for \xpackage{ragged2e} settings) and the column
+%        type (\textt{p,m,b}). \textt{tabu} has also a \emph{default target width} when used
+%        with \textt X columns.
+%  \item You are used to the \textt{tabular} environment in text mode, and \textt{array} in math mode,
+%        but \textt{tabu} works in both modes and its name does not change... \textt X columns are also
+%        possible in math mode; \xpackage{delarray} shortcuts for delimiters are available in both math and text modes.
+%  \item a \textt{tabu} environment can contain another tabular of any kind: \textt{tabular}, \textt{tabular\stform*},
+%        \textt{tabularx} or \textt{tabu} itself can be placed in any cell of a \textt{tabu}. Conversely,
+%        \textt{tabu} can be placed in a \textt{tabular}, \textt{tabularx} \etc.
+%  \item \textt{tabu} introduces optional parameters to columns specifications, providing facilities
+%         for modifying columns of line widths, inserting verbatim text...
+%  \item \textt{tabu} is more than compatible with \xpackage{arydshln} (for dashed and dotted lines)
+%        and \xpackage{colortbl}: actually some corrections of those packages are loaded as soon as you
+%        enter a \textt{tabu} environment. Compatibility with \xpackage{delarray}, \xpackage{hhline},
+%        \xpackage{makecell}, \xpackage{booktabs}, \xpackage{siunitx}, \xpackage{dcolumn}, \xpackage{warpcol},
+%        \etc\ is fine too.
+%        When you are inside a \textt{tabu} environment, you can use \cs{raggedleft}, \cs{raggedright}
+%        and \cs{centering} without special care about \cs{arraybackslash} and conversely \string\\\ has its
+%        ``normal'' meaning inside a list of items that may appear in a \textt X column...
+%  \end{itemize}
+%
+% \bigskip
+%
+% \declmargin \cs{begin}\M*{tabu} \textt{to}\meta{dimen} is like \textt{tabular\textasteriskcentered} but the inter-columns space is
+% given a stretchability of 1fil, in other words \textt{@\M*{\cs{extracolsep}\M*{0pt plus 1fil}}}
+% is inserted by default at the beginning of the tabular preamble, unless you specify another value for \cs{extracolsep}. Therefore
+% ``\textt{tabu to}'' fills in width the specified \meta{dimen}.
+%
+% \bigskip
+%
+% \declmargin \cs{begin}\M*{tabu} \textt{spread}\meta{dimen} does a tabular whose width is \meta{dimen} wider than its natural width.
+% \textt{@\M*{\cs{extracolsep}\M*{0pt plus 1fil}}} is inserted by default if \meta{dimen}$>0$.
+%
+%
+% \subsection{\textt{tabu X} columns}
+%
+% \textt{tabu X} columns can be viewed as an enhancement of \xpackage{tabularx} \textt X columns:
+% \begin{itemize}
+% \item width coefficients can optionally be given to \textt X columns\\
+%       ex.\, \textt{X[2.5]X[1]}\, is the same as\, \textt{X[2.5]X}\, and the same as\, \textt{X[5]X[2]} \\
+%       This means that the first \textt X column will be two and a half wider than the second one or
+%       that the first \textt X column width will be \sfrac{5}{7} of the whole tabular width. \\[.5\baselineskip]
+%       \begin{tabu}{|X[c,2.5]|X[c]|} \firsthline \textt{X[2.5]} & \textt X \\ \hline\end{tabu}
+%       \pagebreak
+% \item horizontal alignment specification is made easier with\, \textt{X[5,r]X[2,c]}\, for example. Vertical
+%       alignment can be specified as well with\, \textt{X[5,r,m]X[2,p,c]}\, (commas are not required,
+%       but \textt{X[2cm]} or \textt{X[4pc]} could be misunderstood -- not by \TeX{}: by you...).\\
+%       \begin{tabu}{X[c]X[4c]c}
+%       \rowfont{\bfseries\ttfamily} Modifier & Meaning & Default \\
+%       \textt l, \textt c, \textt r, \textt j  & left, centered, right, justified  & \textt j \\
+%       \textt p, \textt m, \textt b &  \textt X column is converted into \textt p, \textt m or \textt b column & \textt p \\
+%       \$                      & \textt{X[\$]} is a shortcut for:\, \textt{>\M*{\$}X<\M*{\$}} & \\
+%       \end{tabu}
+% \item \textt{tabu X} columns can be spanned with \cs{multicolum} without any restriction.
+% \item \textt{tabu X} columns can be used with ``\textt{tabu spread}'' for small tabulars.
+% \item \textt{tabu X} columns can contain any type of \textt{tabular}, \textt{tabular*}, \textt{tabularx} or \textt{tabu}
+%       without special care about the syntax. \textt{tabu} can also be put inside \textt{tabular}, \textt{tabular*}
+%       and \textt{tabularx}. As long as \textt{tabu} with \textt X columns has a \emph{default target}, nesting \textt{tabu}
+%       with \textt X columns is easy. Furthermore, the default global alignment of a nested \textt{tabu} is \textt t
+%       (for \textt{top}) while the default global alignment of a \textt{tabu} in a paragraph is \textt c (for \textt{centered}).
+%       ^^AWhen nested inside another \textt{tabu}, \textt{tabu} takes care not to add duplicate margins around its cells...
+% \item The ``algorithm'' (or the arithmetic) to get the target width for \textt{tabu X} columns is the same as the one
+%       used by \xpackage{tabularx}. \cs{hfuzz} is the ``tolerance'' for the whole tabular width. We use \eTeX{} \cs{dimexpr}
+%       instead of \TeX{} primitives (with round/truncate bias correction).
+% \item Convergence to the target width is optimized: the \cs{halign} preamble is not re-built at each trial, but only expanded again,
+%       until the target is reached. Though optimized, the process is the same as the one implemented for \textt{tabularx}
+%       and in particular the content of the \textt{tabu} environment is collected as soon as a \textt{tabu X} column is found in the preamble.
+%       This implies restrictions on catcode modifications and verbatim text inside a \textt{tabu} with \textt X columns.
+% \item If the width of the whole tabular is not specified with ``\textt{tabu to}'' it is considered to be \cs{linewidth}.
+%       \nameref{subsec:linegoal package option} makes the default width equal to \cs{linegoal}. Compilation must then be done
+%       with \hologo{pdfTeX} either in \textt{pdf} or \textt{dvi} mode, and package \xpackage{linegoal} is loaded.
+%       Remember that \cs{linegoal} uses \xpackage{zref-savepos} and \cs{pdfsavepos}:
+%       if the \textt{tabu} is not alone in its paragraph \ie if the target is not
+%       \cs{linewidth}, then two compilations (or more) are required to get the correct target. \\
+%       Default target for nested \textt{tabu} environments is always \cs{linewidth}, which is the column width inside \textt p,
+%       \textt m, \textt b and \textt X columns.
+% \item As long as the \cs{halign} content is expanded more than once, protections against counters incrementation, whatsits (\emph{write})
+%       index entries, footnotes \etc. are set up: the mechanism of \xpackage{tabularx} is reimplemented and enhanced for \textt{tabu X} columns.
+%       \cs{tabuDisableCommands} can be used to neutralize the expansion of additional macros during the trials.
+% \end{itemize}
+%
+% \subsubsection(X columns with tabu spread){X columns with ``\textt{tabu spread}''}
+%
+% \textt{tabu X} columns can be used with ``\textt{tabu spread}'' to adjust the column widths of tabulars that contain
+% only small pieces of text. The question is: how to make a tabular the width of the line, with 6 columns; the columns 1, 2, 5 and 6
+% are of equal widths and the widths of columns 3 and 4 are only one half. As possible solution:
+%
+% \begin{Verb*}
+%  \begin{tabu} to\linewidth{|X[2]|X[2]|X|X|X[2]|X[2]|} \hline
+%  1  &  2  &  3  &  4  &  5  &  6 \\\hline
+%  \end{tabu}
+% \end{Verb*}
+%
+% \medskip
+%
+%  \begin{tabu} to\linewidth{|X[2]|X[2]|X|X|X[2]|X[2]|} \hline
+%  1          &2 &3 &4 &5 &6 \\\hline
+%  \end{tabu}
+%
+%  \bigskip
+%
+% But the text in each cell is very short: one single character, and you prefer the table to be tight,
+% but don't know the exact width of the whole:\pagebreak
+%
+% \begin{Verb*}
+% \begin{tabu} spread 0pt{|X[2]|X[2]|X|X|X[2]|X[2]|} \hline
+%  1  &  2  &  3  &  4  &  5  &  6 \\\hline
+% \end{tabu}
+% \end{Verb*}
+%
+% {\centering
+% \begin{tabu} spread0pt{|X[2]|X[2]|X|X|X[2]|X[2]|} \hline
+%  1  &  2  &  3  &  4  &  5  &  6 \\\hline
+% \end{tabu}\par}
+%
+% \bigskip
+%
+% But now it's definitely too narrow, then give it some more space:
+%
+% \begin{Verb*}
+% \begin{tabu} spread 2in{|X[2]|X[2]|X|X|X[2]|X[2]|} \hline
+%  1  &  2  &  3  &  4  &  5  &  6 \\\hline
+% \end{tabu}
+% \end{Verb*}
+%
+% {\centering
+% \begin{tabu} spread2in{|X[2]|X[2]|X|X|X[2]|X[2]|} \hline
+%  1  &  2  &  3  &  4  &  5  &  6 \\\hline
+% \end{tabu}\par}
+%
+%  \bigskip
+%
+% \textt{tabu spread} is useless with long columns: the following tabular was made with this preamble:
+% \begin{Verb*}
+% \begin{tabu} spread 3cm{@{}X[9]X[4]|X|}
+% \end{Verb*}
+%
+%
+% {\footnotesize
+% \begin{tabu} spread 3cm{@{}X[9]>{\parskip=5pt}X[4]|X|}
+% "Like the air we breathe, Sherlock Holmes is everywhere.
+% His pipe-smoking, deer stalkered image peers at us from ads in Yellow Pages,
+% to signs for neighbourhood crime-watch; from billboards to the classroom;
+% from film and television to the public library, and now over the Internet.
+% He long ago transcended the boundaries of 19th Century London to become
+% an international best-seller and has been accepted as part
+% of British folklore. Holmes is alive to millions."
+% &
+% There the text was too long, and \textt{tabu spread} behaves as if you didn't give it a target.\par
+% The result of this example is the same as if one had written \cs{begin}\M*{tabu}\textt{to}\cs{linewidth}.
+% & \cellcolor{GhostWhite}\centering\rotatebox{-90}{\kern-1.4ex\bfseries Sherlock Holmes}
+% \\ \tabucline{1-2}
+% \multicolumn{2}{|c|}{And a \cs{multicolumn} cell, just to see} & \omit \\ \tabucline{1-2}
+% \end{tabu}}
+%
+% In the preamble, \textt{@\M*{}} means that you remove the margin.
+%
+%
+% \subsubsection{Nesting \textt{tabu}{\texorpdf\small s} with \textt X columns}
+%
+% This section should contain some examples but I've no time presently...
+%
+% \subsection{Lines inside \textt{tabu}}
+%
+% \subsubsection{First important remarks}
+%
+% The features provided in this section are quite experimental: they are not generally taken for good typography.
+% You can use \xpackage{tabu} with package \xpackage{booktabs} for example, which provides properly designed
+% commands for horizontal rules in tabulars. \xpackage{arydshln} is pretty good too, but it modifies a huge
+% amount of macros of \xfile{array.sty}, something that \thispackage does not.
+%
+% Lines in \textt{tabu} printed in this document are mostly made with \xpackage{booktabs}.
+%
+%
+% \subsubsection(Vertical lines){Vertical lines: \textt\textbar\ has an optional parameter}
+%
+% Inside \textt{tabu} environment, the vertical line marker \textt\textbar\  has an \emph{optional} argument
+% which is the width of the vertical rule. The default width remains \cs{arrayrulewidth} of course.
+% The optional argument for \textt\textbar\ can also contain the name of a color.
+% color \emph{names} are only possible, not a color specification by the mean of a color model.
+% The width of the line if specified, must come before the color name (sorry for that, but I was tired
+% to parse parameters... as for \textt X columns, commas are optional).
+% Example:
+%
+% {\tabcolsep=3pt
+% \begin{tabu}to\linewidth{@{}X[3mc]X[3m]X[6m]@{}} \toprule
+%     \begin{tabu}{||[5pt]|c|c||[5pt]|}
+%        Hello & World
+%     \end{tabu}
+% &
+% The \textt{tabu} you see on left was made with the code displayed on the right.
+% &
+% \verbatim{
+% \begin{tabu}{||[5pt]|c|c||[5pt]|}^^@
+%     Hello & World^^@
+% \end{tabu}}
+% \\ \midrule
+%     \begin{tabu}{||[5pt,red]|c|c||[5pt blue]|}
+%        Hello & World
+%     \end{tabu}
+% &
+% The \textt{tabu} you see on left was made with the code displayed on the right.
+% &
+% \verbatim{
+% \begin{tabu}{||[5pt,red]|c|c||[5pt blue]|}^^@
+%     Hello & World^^@
+% \end{tabu}}
+% \\ \bottomrule
+% \multicolumn{3}{r}{\scriptsize\lk The \cs{verbatim} command available inside \textt{tabu} with \textt X columns was used: guess in which cells...?}
+% \end{tabu}}
+%
+% Note that it is always a good idea to protect the optional argument with braces: \M*[\M*{...}].
+% But it's not necessary because \thispackage takes care the \textt\textbar\ token to be rewritten
+% before any other column type (just after \stform* however, for obvious reasons). But if you
+% use the optional argument for the vertical line into a user-defined column type
+% (declared with \cs{newcolumntype} for example), you can get an error. In this case,
+% it is compulsory to protect the optional argument by braces. Finally, it's not very often
+% that a user-column type contains a vertical bar...
+%
+%
+% \subsubsection(Horizontal lines){More style for horizontal lines: \cs{tabucline}}
+%
+% \begin{declcs}{tabucline}\M[style or spec.]\M*{start-end}\\
+% \end{declcs}
+%
+% \cs{tabucline} is an attempt to give a versatile command to make horizontal lines:
+% \begin{itemize}
+% \item \cs{tabucline} is pretty good with vertical lines even if the thickness of the line grows up,
+% \item \cs{tabucline} takes care of \cs{extrarowheight},
+% \item \cs{tabucline} can make horizontal dashed lines, with a \xpackage{pgf}/\xpackage{TikZ} syntax:\\
+%       \cs{tabucline}\M*[\meta{width} on\meta{dash} off\meta{gap}]\M*{\meta{first column}-\meta{last column}}
+% \item alternatively, you can give \cs{tabucline} a \cs{hbox} to make a leader with it: The \meta{\ttfamily spec.} must then
+%       begin with \cs{hbox}, \cs{box} or \cs{copy},
+% \item finally you can give \cs{tabucline} a color \emph{name}, after the line specification.
+% \end{itemize}
+%
+%
+%
+% Any parameter can be omitted. \tabulinestyle{tabucline=.4pt on2pt off1.5pt}
+%
+% {\parskip=0pt\topsep=0pt
+% \begin{center}\def\margintext#1{\noalign{\vtop to0pt{\marginnote{\ttfamily\small #1}[-1.8ex]\vss}}}^^A
+% \begin{tabu}{|[1.5pt]|>{\ttfamily}X@{\hskip\tabcolsep}X[1.4]||[1.5pt]} \tabucline[\heavyrulewidth]- \savetabu{tabucline}
+%  \cs{tabucline}\M*[1pt on 1.5pt off 2pt]\M*{1-4} & draws a horizontal dashed line of width \textt{1pt}. Dashes are
+%                                                    \textt{1.5pt} long and gap width is \textt{2pt}. The line is drawn
+%                                                    between columns 1 and 4. Here there are only 2 columns and the line
+%                                                    stops at column 2. \\ \tabucline[1pt on 1.5pt off 2pt]{1-4} \margintext{[1pt on 1.5pt off 2pt]}
+%  \cs{tabucline}\M*[1.5pt]\M*{-}                    & draws a horizontal solid line of width \textt{1.5pt} between the first
+%                                                    and the last column. \\ \tabucline[1.5pt]{-} \margintext{[1.5pt]}
+%  \cs{tabucline}\M*{2-}                           &  draws a horizontal solid line of width \cs{arrayrulewidth} between the second
+%                                                    column and the last one.\\ \tabucline{2-} \margintext{default}
+%  \cs{tabucline}\M*[on 2pt red]\M*{-5}            &  draws a horizontal dashed line between columns 1 and 5
+%                                                     of width \cs{arrayrulewidth}. Dashed are
+%                                                    \textt{2pt} long and gaps width is \textt{4pt} (the default).
+%                                                    \\ \tabucline[on 2pt red]{-5} \margintext{[on 2pt red]}
+% \end{tabu}
+% \end{center}}
+%
+% \begin{declcs}{tabucline}\stform*\M[style or spec.]\M*{start-end}
+% \end{declcs}
+%
+% For fine tuning, the star form \cs{tabucline}\stform* can be used to keep the vertical lines that might
+% cross the horizontal line. As a consequence, the content of special \textt @ of \textt ! columns
+% will interrupt the horizontal line either. This might be usefull when \cs{extrarowheight} is high.
+% Example:
+%
+% {\makeatletter
+% \begin{tabu}{*3{X[mc]}}
+% \extrarowheight=8pt
+% \begin{tabu}{|[1pt]X|X|[1pt]} \tabucline-
+% Hello & world \\ \tabucline[1pt on 2pt off 2pt,blue]-
+% Hello & world \\  \tabucline-
+% \end{tabu}
+% &
+% \extrarowheight=8pt
+% \begin{tabu}{|[1pt]X|X|[1pt]} \tabucline*-
+% Hello & world \\ \tabucline*[1pt on 2pt off 2pt blue]- ^^A\tabucline*[3pt on 3pt off 3pt]-
+% Hello & world \\  \tabucline*-
+% \end{tabu}
+% &
+% \extrarowheight=8pt
+% \begin{tabu}{|[1pt]X|X|[1pt]} \firsthline
+% Hello & world \\ \hline
+% Hello & world \\  \lasthline
+% \end{tabu} \\
+% \extrarowheight=0pt
+%   \cs{tabucline}
+% & \cs{tabucline}\stform*
+% & \cs{firsthline} and \cs{hline} and \cs{lasthline} \\
+% \multicolumn3c{In each table, \cs{extrarowheight} is equal to \textt{8 pt}.} \\
+% \end{tabu}}
+%
+% \cs{tabuclines} tries to put the line in the middle, so that the text is centered in its cell. \enlargethispage\baselineskip
+% \cs{tabuclines}\stform* tries to take care of vertical lines.
+% Well this is not perfect: it works pretty well with simple vertical lines, but not really with double
+% lines, triple lines with colors etc... But it can help in simple cases...
+%
+% \pagebreak
+% \begin{declcs}{tabulinestyle}\M{style=spec., style=spec., style=spec. ...}
+% \end{declcs}
+%
+% This command defines a line style to be used in the first optional argument of \cs{tabucline}:
+%
+% \begin{tabu}{@{}X[1.6,c]@{}X[c]@{}} \tabucline[\heavyrulewidth]- \tabucline[\hbox{$\scriptstyle\star$}]- \toprule
+% \rowfont[c]{\bfseries} Define the line style & Use the line style \\ \midrule
+% \cs{tabulinestyle}\M*{myline=0.4pt on 1.5pt off 1pt} & \cs{tabucline}\M*[myline]\M*{-} \\ \tabucline[\heavyrulewidth on 1pt off 2pt]-
+% \cs{tabulinestyle}\M*{myleader=\cs{hbox}\M*{\$\cs{scriptstyle}\cs{star}\$}} & \cs{tabucline}\M*[myleader]\M*{1-3} \\
+% \multicolumn{2}{c}{This way it is easy to change dashed lines into solid ones} \\ \bottomrule \tabucline[\hbox{$\scriptstyle\star$}]- \tabucline[\heavyrulewidth]-
+% \end{tabu}
+%
+% \begin{tabu}{*{3}{X[cm]}}
+% \tabcolsep=2pt
+% \begin{tabu}{|l|l|} \tabucline[.4pt on 1pt off 3pt]{-}
+% \multicolumn{2}{|c|}{Dashed or dotted} \\ \tabucline[1pt on2pt off1pt]{-}
+% And below & is the default \\ \tabucline[on 4pt]-
+% \end{tabu}
+% &
+% \tabcolsep=2pt
+% \begin{tabu}{|c|c|} \tabucline[.4pt off 2pt]{-}
+% Dash & Gap \\ \tabucline[10pt on2pt off 1pt]{1-1}
+% \multicolumn{2}{|c|}{This one was thick} \\ \tabucline[3pt]-
+% \end{tabu}
+% &
+% \tabcolsep=2pt
+% \begin{tabu}{|X[cm]|X[cm]|X[2cm]|} \tabucline[.4pt on6pt off 2pt]{-}
+% Dash & Gap... & ...or leader \\ \tabucline[\hbox{\small\kern1pt\ScissorRight\vrule width3.4pt depth-5pt height5.4pt\kern1pt\vrule width3.4pt depth-5pt height5.4pt\kern1pt}]-
+% \multicolumn{3}{|c|}{Interesting ?} \\ \tabucline-
+% \end{tabu}
+% \end{tabu}
+%
+% \enlargethispage{2\baselineskip}
+% \small
+% \hfil\Shapepar{\nutshape}{Now we stop it because things are becoming too ugly and go to have a look at \textt{tabu} in mathematical mode...}\hfil\null
+%
+% \normalsize
+%
+%
+% \subsection{\textt{tabu} in math mode}
+%
+% {
+% \extrarowheight=3pt
+% \begin{tabu} to\linewidth{X[1.5]X[r$]} \toprule
+% On the left, you can see the famous Maxwell-Lorentz equations for electromagnetic field in vacuum,
+% publicated in \oldstylenums{1873}.
+% &
+% \hfil\begin{tabu}({>{\Gape[8pt]\displaystyle}r>{\displaystyle}l}.
+% \Div\vv E  &= \frac{\rho}{\epsilon_0}                             \\
+% \Div\vv B  &= 0                                                   \\
+% \Rot\vv E  &= - \dpartial{\vv B} t                                \\
+% \Rot\vv B  &= \mu_0 \vv j + \mu_0 \epsilon_0\, \dpartial{\vv E} t
+% \end{tabu}
+% \\ \bottomrule
+% \end{tabu}}
+%
+% In this example, the big \textt{tabu} is: \cs{begin}\M*{tabu} to\cs{linewidth}\M*{X[1.5]X[r\$]}.
+%
+% The nested \textt{tabu} (in math mode) uses \xpackage{delarray} shortcut: its preamble is:
+% \begin{Verb}
+%    \begin{tabu}({>{\Gape[8pt]\displaystyle}r>{\displaystyle}l}.
+% \end{Verb}
+%
+% You immediately see the interest for \textt{tabu} to have a default target.
+%
+% \cs{Gape} is a \xpackage{makecell} macro to adjust the height and depth of the rows.
+%
+% Horizontal rules are \xpackage{booktabs} \cs{toprule}, \cs{midrule} and \cs{bottomrule}.
+%
+% \begin{tabu}{@{}*3{X[c]@{}}} \toprule \savetabu{math}
+% \rowfont{\bfseries} \textt{array} & \textt{tabu} & \textt{tabu spread 1em} \\ \midrule
+% $\begin{array}[t]|{cc}|
+% \alpha & \beta \\
+% \gamma & \delta
+% \end{array}$
+% &
+% $\begin{tabu}|{cc}|
+% \alpha & \beta \\
+% \gamma & \delta
+% \end{tabu}$
+% &
+% $\begin{tabu} spread 1em|{cc}|
+% \alpha & \beta \\
+% \gamma & \delta
+% \end{tabu}$
+% \\ \bottomrule
+% \end{tabu}
+%
+%
+% Here, vertical lines are made with \xpackage{delarray} shortcuts:\hfill
+% \verb+$\begin{tabu} spread 1em |{cc}|+
+%
+% \begin{tabu}{\usetabu{math}}
+% \multicolumn2{@{}l}{Vertical lines inside the tabular preamble gives:}
+% &
+% $\begin{tabu} spread 1em[c]{|cc|}
+% \alpha & \beta \\
+% \gamma & \delta
+% \end{tabu}$
+% \end{tabu}
+%
+% \bigskip
+% {\raggedleft\footnotesize\lk This was an example of \cs{savetabu}...\cs{usetabu} to keep the alignment.\par}
+%
+%
+% \subsection{Verbatim inside \textt{tabu} with \textt X columns}
+%
+% The process of computing \textt X columns widths implies to make ``trials'': this means that
+% the tabular is first printed in internal mode, inside a box which is measured until the target
+% width is reached. Such trials require to collect the content of the \textt{tabu} environment.
+% Therefore, the category codes of the characters read in the environment are fixed, and \cs{verb}
+% commands are not allowed.
+%
+% \begin{declcs}{verbatim}\M{general text}
+% \end{declcs}
+%
+% To get round this limitation, \textt{tabu} provides the command \cs{verbatim} which allows to put
+% some pieces of verbatim text inside a \textt{tabu}: it is based on \eTeX{} \cs{scantokens} primitive
+% and is defined only inside the \textt{tabu} environment. \cs{verbatim} has some other limitations
+% you must know:
+%
+%
+% \begin{tabu}to\linewidth{>{\ttfamily\centering}p{3cm}p{\dimexpr\linewidth-3cm-4\tabcolsep}} \toprule
+%  \verb+^^@+        &can be used to get a carriage return inside \cs{verbatim} \\
+%  \verb+^+          &consequently \verb+^+ is a normal subscript character     \\
+%  \verb+{+ \verb+}+ &curly braces must be equilibrated                         \\
+%  \%                &The percent character\, \%\, is for commentaries: the content of the
+%                     environment is collected before \cs{verbatim} does its job, therefore commentaries are
+%                     removed...
+%                    \\\bottomrule
+% \end{tabu}
+%
+% If you need more verbatim inside a \textt{tabu} environment:
+% \begin{itemize}
+% \item you should avoid the use of \textt X columns
+% \item or if you really want to use \textt X columns, you must save your verbatim text before the \textt{tabu},
+%     for example with the \textt{SaveVerbatim} environment provided by the package \xpackage{fancyvrb}.
+% \end{itemize}
+%
+%
+%
+% \subsection(Numbers in tabu){Printing numbers inside \textt{tabu} with \xpackage{numprint} and \xpackage{siunitx}}
+%
+% \subsubsection{Just make it easy !}
+%
+% \thispackage provides a \emph{facility} to print numbers inside columns. This facility is not
+% implemented to replace \xpackage{siunitx} \textt S and \textt s columns or \xpackage{numprint}
+% \textt n and \textt N columns or other packages that provide alignment such as \xpackage{warpcol},
+% \xpackage{dcolumn} or \xpackage{rccol}. It just make
+% easy to apply a macro you get already on each number in a column of a \textt{tabu}.
+%
+% \cs{tabudecimal} has been developped mainly because it makes possible to align numbers inside \textt{tabu X} columns.
+%
+% \begin{declcs}{tabudecimal}\M{user-macro}
+% \end{declcs}
+%
+% \cs{tabudecimal} can be used in the preamble of a \textt{tabu} before a column specification.
+% The \meta{user-macro} is a macro with one parameter that have to be defined before.
+%
+% \medskip
+%
+% Example with \csbf{numprint}:
+%
+%
+% \begin{Verb*}
+% \def\usermacro#1{\numprint[\officialeuro]{\zap@space #1 \@empty}}
+% \nprounddigits{2} \npprintnull \npthousandsep{\,} \npunitseparator{~}
+% \end{Verb*}
+%
+% \begin{SaveVerbatim}{tabudecimal}
+% \begin{tabu}{*2{>{\tabudecimal\usermacro}r}}
+%  12.324    &745.32  \\
+%  21.13     &0       \\
+%  213.3245  &12.342  \\
+%  322143.12 &324.325 \\
+% \end{tabu}
+% \end{SaveVerbatim}
+%
+% \nprounddigits{2} \npprintnull \npthousandsep{\,} \npunitseparator{~}
+% \makeatletter \let\npunitcommand\@firstofone
+% \def\usermacro#1{\numprint[\officialeuro]{\zap@space #1 \@empty}}
+% \makeatother
+%
+% \begin{tabu}{XX}
+% \multicolumn{2}{l}{\verbatim{\begin{tabu}{|[GreenYellow]*2{>{\tabudecimal\usermacro}X[r]|[GreenYellow]}}}} \\
+% \verbatim{
+%  \rowfont[c]{\bf} January & February \\ ^^@
+%  12.324    & 745.32  \\ ^^@
+%  21.13     & 0       \\ ^^@
+%  213.3245  & 12.342  \\ ^^@
+%  2143.12 & 324.325 \\ ^^@
+% \end{tabu}}
+% &
+% \begin{tabu}{|[GreenYellow]*2{>{\tabudecimal\usermacro}X[r]|[GreenYellow]}c} \tabucline[1pt GreenYellow]-
+% \rowfont[c]\bf       January   &February & ...\\ \tabucline[1pt on2pt GreenYellow]-
+%                      12.324    &745.32   & ... \\
+%                      21.13     &0        & ... \\
+%                      213.3245  &12.342   & ... \\
+%                      2143.12 &324.325  & ... \\ \tabucline[1pt GreenYellow]-
+% \end{tabu}
+% \end{tabu}
+%
+% \medbreak
+%
+% Example with \csbf{SI}:
+%
+% \begin{Verb*}
+% \def\usermacro#1{\SI[group-four-digits=true,            % thousand separator
+%                                round-mode=places,                % round numbers
+%                                round-precision=2,                  % with 2 decimal digits
+%                                round-integer-to-decimal=true,  % add trailing 0 if necessary
+%                                per-mode=symbol]{#1}{\officialeuro\per\kilo\gram}}
+% \begin{tabu}spread 0pt{|[GreenYellow]*2{>{\tabudecimal \usermacro}X[r]|[GreenYellow]}} ....
+% \end{Verb*}
+%
+%
+% \def\usermacro#1{\SI[group-four-digits=true,
+%                      round-mode=places,
+%                      round-precision=2,
+%                      round-integer-to-decimal=true,
+%                      per-mode=symbol]{#1}{\officialeuro\per\kilo\gram}}
+% \begin{tabu}{*2{X}}
+% \begin{tabu}spread 0pt{|[GreenYellow]*2{>{\tabudecimal\usermacro}X[r]|[GreenYellow]}c} \tabucline[1pt GreenYellow]-
+% \rowfont[c]\bf       January  &February &... \\\tabucline[1pt on2pt GreenYellow]-
+%                      12.324   &745.32   &... \\
+%                      21.13    &0        &... \\
+%                      213.3245 &12.342   &... \\
+%                      2143.12  &324.325  &... \\\tabucline[1pt GreenYellow]-
+% \end{tabu}
+% &
+% As you can see, the columns widths are exactly the same, whatever their content.
+% \end{tabu}
+%
+% \subsubsection{You should know how it works...}
+%
+% Yes you should know how it works to avoid problems. \textt{tabu} has a small scanner
+% based on \cs{futurelet} to grab all numbers, blank spaces, commas and dots $+$ and $-$ sign
+% and also the letter \textt e and  \textt E for exponants.
+% The scanner stops as soon as something else than a number, blank space, comma, dot, $+$, $-$, \textt e, \textt E
+% is found, and even if it is a macro that contains a number.
+%
+% This explains why there is \cs{zap@space} in the definition of \cs{usermacro}: because the scanner
+% scans blank spaces and because \cs{numprint} does not allow blank spaces in its mandatory argument,
+% quite strangely...
+%
+
+%
+%
+%
+% \subsection{\texorpdf\xpackage{delarray} shortcuts}
+%
+% When you enclose your tabular with math delimiters using \xpackage{delarray} shortcuts,
+% \xpackage{tabu} tries to reach its target for the whole: the tabular and the delimiter(s).
+% You can see the difference:
+%
+% {\centering
+% \extrarowheight=8pt
+% \begin{tabu}to .6\linewidth{X[m]} \toprule
+%
+% \extrarowheight=0pt
+% \begin{tabu}({X})
+%  This is \textt{tabu} with \xpackage{delarray} shortcut for parenthesis around
+% \end{tabu}
+% \\ \tabucline[1pt on2pt blue]-
+%
+% \extrarowheight=0pt
+% \begin{tabularx}{\linewidth}[t]({X})
+%  This is \textt{tabularx} with \xpackage{delarray} shortcut for parenthesis around
+% \end{tabularx}
+% \\ \tabucline[1pt on2pt blue]-
+%
+% \extrarowheight=0pt
+% \begin{tabu}\{{X}\}
+%  This is \textt{tabu} with \xpackage{delarray} shortcut for curly brackets around
+% \end{tabu}
+% \\ \tabucline[1pt on2pt blue]-
+%
+% \extrarowheight=0pt
+% \begin{tabularx}{\linewidth}[t]\{{X}\}
+%  This is \textt{tabularx} with \xpackage{delarray} shortcut for curly brackets around
+% \end{tabularx}
+% \\ \tabucline-
+%
+% \end{tabu}\par}
+%
+% With \textt{overfull hboxes (15.8pt and 16.1pt too wide)} for \textt{tabularx}.
+%
+%
+% \section(save the tabu preamble){Save the \textt{tabu} preamble and \textt X columns widths: \cs{savetabu}, \cs{usetabu}}
+%
+% \begin{declcs}{savetabu}\M{user-name}
+% \end{declcs}
+%
+% The command \cs{savetabu} can be used at the end of any line of a \textt{tabu} environment to save the
+% target width (or the spread), the columns specifications (tabular preamble) and the widths of
+% \textt{tabu X} columns (if there is any).
+% This possibility allows to easily make tabulars which share exactly the same shape
+% throughout your document. This can also be used as a kind of \textt{tabbing} environment
+% which is able to remember the tabs positions.
+%
+% If the \meta{user-name} has been used before, an info is displayed in the \xext{log} file and the
+% previous settings are overwritten.
+%
+%
+% \begin{declcs}{usetabu}\M{user-name}
+% \end{declcs}
+%
+% \cs{usetabu} is the complement of \cs{savetabu}: it can be used in the \textt{tabu}
+% preamble instead of the usual columns specifications
+% to restore any previous settings saved with \cs{savetabu}.
+% The \meta{user-name} must exist otherwise, you get an error.
+%
+% \cs{usetabu} locally restores:
+% \begin{itemize}
+% \item the preamble,
+% \item the target width of the \textt{tabu} in points: the saved target width does not contain
+%       any control sequence: it is fixed and stored in points,
+% \item the width of \textt{tabu X} columns: those widths are not calculated any more, and \textt{X}
+%       columns are directly transformed into \textt p, \textt m or \textt b columns.
+% \item \cs{tabcolsep} (or \cs{arraycolsep} in math mode)
+% \item \cs{arrayrulewidth}, \cs{doublerulesep}, \cs{extrarowheight} and \cs{extratabsurround}
+% \end{itemize}
+%
+% Example:
+%
+% \begin{Verb*}
+%  \extrarowheight=5pt\tabcolsep=12pt
+%  \begin{tabu}to .7\linewidth{|XXX|X[c]|} ($db(\savetabu)){mytabu}   \tabucline*[on1pt]-
+%   This & is & tabu & package                                             \\ \tabucline*[on1pt]-
+%  \end{tabu}
+%  \begin{tabu}{($db(\usetabu)){mytabu}}                                          \tabucline*[on1pt]-
+%  \multicolumn3{|c}{This is tabu} & package                         \\ \tabucline*[on1pt]-
+%  \end{tabu}
+% \end{Verb*}
+%
+%  \begin{center}
+%  \tabulinestyle{myline=on1pt}\extrarowheight=5pt\tabcolsep=12pt
+%  \begin{tabu}to .7\linewidth{|XXX|X[c]|} \savetabu{mytabu} \tabucline*[myline]-
+%   This & is & tabu & package         \\ \tabucline*[myline]-
+%  \end{tabu}
+%
+%
+%  \begin{tabu}{\usetabu{mytabu}}            \tabucline*[myline]-
+%  \multicolumn3{|c|}{This is tabu} & package    \\ \tabucline*[myline]-
+%  \end{tabu}
+%
+%  \end{center}
+%
+% If one day you use \textt{tabu}, you will have the idea to restore a \textt{tabu} while modifying its target,
+% or adding new columns... \cs{savetabu} and \cs{usetabu} have not been thought for this purpose, and you may
+% have unexpected results. \cs{usetabu} is a help to get several tabulars of exactly the same shape, same target,
+% same preamble.
+%
+%
+%
+%
+% \section(row font and alignment){Change the font and the alignment in one row: \cs{rowfont}}
+%
+% \begin{declcs}{rowfont}\M[alignment]\M*{font specification}
+% \end{declcs}
+%
+% Inside a \textt{tabu} environment, you can modify the font for each cell in a row.
+% \cs{rowfont} has priority over column font specification, exactly like \cs{rowcolor} (package \xpackage{colortbl})
+% has priority over \cs{columncolor}.
+%
+% The alignment of each cell in one row can also be changed to: \topsep=0pt
+% \begin{center}
+% \begin{tabu}{>{\ttfamily}r@{\,$=$\,}lc>{\ttfamily}r}
+% l          &left    &{\qquad\smaller or\, for \xpackage{ragged2e} settings: } &L \\
+% c          &center  &                                                         &C \\
+% r          &right   &                                                         &R \\
+% j          &justify &                                                         &J \\
+% \end{tabu}
+% \end{center}
+%
+% Any other value for the optional \meta{alignment} parameter is silently ignored. If \xpackage{ragged2e} is not loaded,
+% \textt L\, \textt R\, \textt C\, and\, \textt J\, are synonymous with the lowercase equivalent.
+%
+% \section(Differences: tabu, tabular, tabularx){Differences between \textt{tabu}, \textt{tabular} and \textt{tabularx}}
+%
+% \subsection{Paragraph indentation}
+%
+% \textt{tabu} takes care of paragraph indentation when it is used with \textt X columns and its default target,
+% no matter if it has been loaded or not with the \textt{linegoal} option.
+% Example with \LaTeX{} default: \cs{parindent} $=20$pt.
+%
+% {\parindent=20pt \makeatletter\let\tabudefaulttarget\linewidth\makeatother
+%
+% \begin{tabu}{|[GreenYellow]X|[GreenYellow]} \tabucline[GreenYellow]-
+% This is \textt{tabu} with its default target in an indented paragraph. \\ \tabucline[GreenYellow]-
+% \end{tabu}
+%
+% \noindent\begin{tabu}{|[GreenYellow]X|[GreenYellow]}\tabucline[GreenYellow]-
+% This is \textt{tabu} with its default target, preceded by \cs{noindent} \\ \tabucline[GreenYellow]-
+% \end{tabu}
+%
+%
+% \begin{tabularx}\linewidth{|X|} \hline
+% This is \textt{tabularx} with target: \cs{linewidth} in an indented paragraph. \\ \hline
+% \end{tabularx}
+%
+% \noindent\begin{tabularx}\linewidth{|X|} \hline
+% This is \textt{tabularx} with target: \cs{linewidth}, preceded by \cs{noindent} \\ \hline
+% \end{tabularx}}
+%
+%
+% \subsection{Custom environments}
+%
+% Unlike \textt{tabularx}, it is possible to define your own environment using \textt{tabu}:
+%
+% \begin{Verb}
+% \newenvironment{foo}
+%     {\begin{tabu}{X[1.2]|[1pt gray]X}}
+%     {\end{tabu}}
+% \end{Verb}
+%
+% \newenvironment{footabu}
+%     {\begin{tabu}{@{}X[1.2]|[1pt,gray]X@{}}}
+%     {\end{tabu}}
+%
+% \begin{footabu}
+% \textt{tabu} environment, even when \textt X columns are used, may appear
+% in the definition of your custom tabular environment.
+% &
+% You can also use the commands \cs{savetabu} and \cs{usetabu} for this purpose.
+% \end{footabu}
+%
+%
+%
+% \subsection{Inversion of tokens}
+% \label{subsec:inversion of tokens}
+%
+% \begin{SaveVerbatim}{tempVerb}
+% \begin{tabular}{|>{\bfseries}>{ before }l<{ one }<{ two }|}
+%     cell content
+% \end{tabular}
+% \end{SaveVerbatim}
+%
+%
+% When you typeset the following \textt{tabular}:
+% \UseVerbatim{tempVerb}
+%
+% \begin{tabu}to .9\linewidth{XX} \savetabu{tabbing}
+% You get the following result:
+% &
+% \begin{tabular}{|>{\bfseries}>{ before }l<{ one }<{ two }|}
+%     cell content
+% \end{tabular}
+% \end{tabu}
+%
+%
+% \smex The word \emph{before} is not bold, and \textitbf{two} comes before \textitbf{one}.
+%
+% The reason is explained in the documentation of \xfile{array.sty}, and is related
+% to the \textt{array} environment in math mode when using \cs{newcolumntype}.
+%
+% This rather strange inversion of tokens may be justified in math mode (otherwise, errors may occur)
+% but not in text mode in our opinion. Inside a \textt{tabu} environment, when not in math mode,
+% the tokens are not reversed and you get the intuitively expected result:
+%
+% \begin{tabu}{\usetabu{tabbing}}
+% &
+% \begin{tabu}{|>{\bfseries}>{ before }l<{ one }<{ two }|}
+%     cell content
+% \end{tabu}
+% \end{tabu}
+%
+% In math mode however, tokens are in the reverse order in the \textt{tabu} environment
+% like they are in the \textt{array} environment.
+%
+% \subsection(Improved rewrite process){Improved process for rewritting columns}
+%
+% In the following example, you get an error with \textt{tabular} and no error with \textt{tabu}.
+% With \textt{tabular}, and \xpackage{siunitx} \textt S column, the rewritting process is as follow:
+%
+% \begin{SaveVerbatim}{siunitx}
+% \documentclass{minimal}
+% \usepackage{numprint,siunitx,xcolor}
+% \usepackage{tabu}
+% \begin{document}
+%
+% \begin{tabular}{*2{S[color=green]}}
+%     123,45
+% \end{tabular}
+%
+% \begin{tabu}{*2{S[color=green]}}
+%     123,45
+% \end{tabu}
+%
+% \end{document}
+% \end{SaveVerbatim}
+%
+% \begin{tabu}{@{}X[m]X[m1.2]@{}}
+% \UseVerbatim{siunitx}
+% &
+% Inside \textt{tabular}:
+% \begin{enumerate}[label=\arabic*),topsep=\parskip,itemsep=.5\parskip]
+% \item Rewrite \textt S: not found because inside \M*{...}
+% \item Rewrite \stform*
+% \item Rewrite \textt n column defined by package \xpackage{numprint} \\
+%       Then the \textt `n' in \textt{gree\textcolor{red}n} is rewritten \smex problem
+% \end{enumerate}
+% \vskip1ex
+% Inside \textt{tabu}:
+% \begin{enumerate}[label=\arabic*),itemsep=.5\parskip,topsep=\parskip,parsep=\parskip]
+% \item Rewrite \stform*
+% \item Rewrite \textt\textbar\ (there is none here)
+% \interitem \textt{\scshape go back}
+% \item Rewrite \stform*
+% \item Rewrite \textt\textbar\
+% \item Rewrite \textt S
+% \item Rewrite \textt n \smex not found because \textt S rewritten before, according to \xpackage{siunitx} definition.
+% \end{enumerate}
+% \end{tabu}
+%
+% The process of rewritting columns is usually longer inside \textt{tabu} than inside \textt{tabular},
+% but conversely \textt{tabu} with \textt X columns is optimised compared to \textt{tabularx},
+% because the preamble is built only once, not rebuilt before each trial as \textt{tabularx} does...
+%
+% The process of rewritting is very sensitiv to the order in which columns are actually rewritten.
+% Therefore, if it possible to define a new column type using the \textt X token for use with \textt{tabu}:\nobreak
+% \begin{Verb*}
+% \newcolumntype{C}{X[c]}
+% \end{Verb*}
+%
+% it is not recommanded no nest such constructions like:
+% \begin{Verb*}
+% \newcolumntype{Q}{>{\color{green}}C}
+% \end{Verb*}
+%
+% In fact, a problem may arise in nested \textt{tabu}{\small s} if such a \textt Q column type
+% is defined before the \textt C column type...
+%
+% Well, just avoid to nest new column type definitions !
+%
+%
+%
+% \section{The package options}
+%
+% \subsection(The debugshow option){The \textt{debugshow} package option}
+%
+% \begin{declcs}{tracingtabu}
+% \end{declcs}
+%
+% With the package option \textt{debugshow}, \xpackage{tabu} will report the widths it computes
+% at each attempt to read the target, when \textt X columns are used.
+% The control sequence \cs{tracingtabu} has the same effect as the \textt{debugshow} option.
+%
+% Typical information in the \xext{log} file:
+%
+% {\ttfamily \noindent \tabcolsep=2pt
+% \begin{tabu}{cr*{3}{>{\centering}X[2]}>{\centering}X>{\centering}X[2]}
+% \rowfont[c]{}
+% (tabu)     &Try &tabu X                                        &tabu Width  &Target      &Coefs &Update \\
+% (tabu)     &1)  &386.67296pt                                   &797.34592pt &386.67296pt &2.0pt &-205.33649pt \\
+% (tabu)     &2)  &181.33647pt                                   &386.67294pt &386.67296pt &2.0pt &0.00002pt \\
+% (tabu)     &2)  & \multicolumn{5}{l}{\ \ Target Reached (hfuzz=0.1pt) **************** }\\
+% \end{tabu}}
+%
+% What does it mean? \def\pt#1{$#1$\textt{pt}}
+% \begin{enumerate}[label=\arabic*),topsep=0pt,itemsep=\parskip,parsep=0pt]
+% \item The first attempt was performed with \textt{X}$=$\pt{386.67296} \\
+%       The \textt{tabu} width (\pt{797.34592}) exceeded the target by \pt{410.67296}. \\
+%       Thus \textt X has been updated: \pt{410.67296} $/2=$ \pt{205.33649} and then:\\
+%       \null\quad\textt X $=$ \pt{386.67296} $-$ \pt{205.33649} $=$ \pt{181.33647}
+% \item The second attempt lead to a \textt{tabu} width of \pt{386.67294}: the target is reached. \\
+%       The final width of each \textt X column is the product of \textt{tabu X} by its width coefficient.
+% \end{enumerate}
+%
+% \subsection(The linegoal option){The \textt{linegoal} package option}
+% \label{subsec:linegoal package option}
+%
+% With the \textt{linegoal} option, the default target for \textt{tabu} with \textt{X} columns is
+% \cs{linegoal} instead of \cs{linewidth}.
+% The \xpackage{linegoal} package must be loaded and compilation must be done with \hologo{pdfTeX},
+% otherwise, a warning is displayed and the \textt{linegoal} option has no effect: the default
+% target remains \cs{linewidth}. \cs{linegoal} works with \hologo{pdfTeX} in \textt{pdf} mode
+% \textbf{and in} \textt{dvi} mode.
+%
+% If for some reason, you wish to turn down the \textt{linegoal} option in your document,
+% you can say (in a group for example):
+% \verb+\let\tabudefaulttarget=\linewidth+
+%
+% \subsection(The delarray option){The \textt{delarray} package option}
+%
+% \textt{delarray} option has the single effect to load \xfile{delarray.sty} for delimiters shortcuts
+% around \textt{tabu}. Delimiters shortcuts work both in math and text mode.
+%
+%
+% \subsection(The light option){The \textt{light} package option}
+% \label{sec:light package option}
+%
+%
+% When you enter a \textt{tabu} environment, two macros amongst the smallest possible of \xfile{array.sty}
+% are modified:
+% these are \cs{prepnext@tok}, which is expanded while \cs{@mkpream} builds the \cs{halign} preamble
+% and \cs{save@decl} to avoid inversion of tokens in text mode (see \nameref{subsec:inversion of tokens}).
+%
+% Modification of \cs{prepnext@tok} is loaded only inside the \textt{tabu} environment, while
+% the modification of \cs{save@decl} is loaded only inside the group in which \cs{@mkpream} works: this is
+% very very local to \textt{tabu} and cannot interfere with any other tabular !
+%
+% \cs{prepnext@tok} could have been loaded inside the \cs{@mkpream} group as well, but then \cs{rowfont}
+% would not have worked inside \textt{array} or \textt{tabular} nested into a \textt{tabu}. Thus the choice.
+%
+% As you see, these modifications do no modify \textt{tabular}, \textt{tabular*}, \textt{tabularx}, \textt{longtable}
+%  \etc \etc \etc
+%
+% If for some reason you prefer the original macros of \xfile{array.sty}, then you can load \thispackage with
+% the ``\textt{light}'' option.
+% As a consequence: \cs{rowfont} and \cs{tabucline} will not be available, and vertical lines \texttt\textbar\
+% will not have an optional argument for their widths and color. However, \textt{tabu X} columns will work normally.
+%
+%
+% \section(Corrections){Corrections of some bugs (available only inside \textt{tabu})}
+%
+% \subsection(delarray compatibility){Correction for colortbl and arydshln: compatibility with delarray}
+%
+% Both \xpackage{colortbl} and \xpackage{arydshln} forget the control sequence \cs{@arrayright} in their implementation,
+% quite strangely because both of them take care of \cs{@arrayleft}.
+%
+% Those control sequences are used by the \xpackage{delarray} package to put parenthesis or bracket around the array.
+%
+%
+% \subsection(arydshln @ columns){Correction for arydshln: \texttbf @ columns}
+%
+% A bug in \cs{adl@xarraydashrule}: \textt{!-arg} columns (class 1) and \textt{@-arg} columns (class 5) should be treated
+% the same wat as far as rules are concerned.
+%
+% With this correction, the \textbf{known problem number 1} in \xpackage{arydshln} documentation is solved.
+%
+%
+%
+% \vskip2cm
+%
+%
+%
+% \begin{SaveVerbatim}[commandchars=$(),gobble=1]{myVerb}
+%  ($db(\definecolorseries)){serie}{rgb}{last}{Goldenrod}{DarkSeaGreen}
+%  ($db(\resetcolorseries))[3]{serie}
+%  \begin{($dr$underline(parse lines))}{($dg(\color{serie!!+}``#1''\par))}
+%     This is a nice little package
+%     and I really don't know
+%     What to do with it !
+%     May be tomorrow...
+%  \end{($dr$underline(parse lines))}
+% \end{SaveVerbatim}
+%
+%
+%
+% \StopEventually{
+% }
+%
+% \IMPLEMENTATION
+%
+% \subsection{Identification, requirements and options}
+%
+% The package namespace is \textttbf{\macrocodecolor tabu@}.
+%
+%
+%    \begin{macrocode}
+%<*package>
+\NeedsTeXFormat{LaTeX2e}[2005/12/01]
+\ProvidesPackage{tabu}[2010/10/28 v1.1 - flexible LaTeX tabulars (FC)]
+\RequirePackage{array}[2008/09/09]
+%    \end{macrocode}
+%
+%    Then minimal catcode acertaining for loading \thispackage in good conditions:
+%
+%    \begin{macrocode}
+\AtEndOfPackage{\tabu@AtEnd\let\tabu@AtEnd\@undefined}
+\let\tabu@AtEnd\@empty
+\def\TMP@EnsureCode#1#2{%
+  \edef\tabu@AtEnd{%
+    \tabu@AtEnd
+    \catcode#1 \the\catcode#1\relax
+  }%
+  \catcode#1 #2\relax
+}% \TMP@EnsureCode
+\TMP@EnsureCode{33}{12} % !
+\TMP@EnsureCode{124}{12}% |
+\TMP@EnsureCode{0}{12}%  ^^@
+\TMP@EnsureCode{36}{3}% $ = math shift
+%    \end{macrocode}
+%
+%    \begin{macro}{\tracingtabu (debugshow option)}
+%
+%    \cs{tracingtabu} is the same as option \textt{debugshow}.
+%
+%    \begin{macrocode}
+\let\tabu@message\@gobble
+\def\tracingtabu{\let\tabu@message\message}
+\let\tabudefaulttarget\linewidth
+\DeclareOption{debugshow}{\tracingtabu}
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{linegoal (package option)}
+%    \begin{macrocode}
+\DeclareOption{linegoal}{%
+   \AtEndOfPackage{\RequirePackage{linegoal}[2010/10/31]}%
+   \def\tabudefaulttarget{\linegoal}% \linegoal is \linewidth if not pdfTeX
+}% linegoal option
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{delarray (package option)}
+%    \begin{macrocode}
+\DeclareOption{delarray}{%
+   \AtEndOfPackage{\RequirePackage{delarray}}%
+}% delarray option
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\light (package option)}
+%    \begin{macrocode}
+\DeclareOption{light}{%
+   \AtEndOfPackage{%
+      \let\tabu@prepnext@tok \prepnext@tok
+      \let\tabu@save@decl \save@decl
+      \let\tabu@rowfont \tabu@norowfont
+      \let\tabucline \tabu@nocline
+      \let\tabu@firstcline \relax
+      \let\tabu@lines \relax
+   }
+}% light option
+\def\tabu@norowfont{\PackageError{tabu}
+   {\string\rowfont\space is not available with option `light'}\@ehd}
+\def\tabu@nocline{\PackageError{tabu}
+   {\string\tabucline\space is not available with option `light'}\@ehd}
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macrocode}
+\ProcessOptions
+%    \end{macrocode}
+%
+%  At Begin Document, we check if a \textt X column has already been defined (\xpackage{tabularx})
+%  and if not, we define a new column type \textt X.
+%
+%  Then a fix for \xpackage{arydshln} and \xpackage{colortbl} comptability with \xpackage{delarray} shortcuts
+%  available inside \textt{tabu}: requirement for this fix is checked by \cs{tabu@fix@arrayright}.
+%
+%  Finally the switch \cs{iftabu@colortbl} is set.
+%
+%    \begin{macrocode}
+\AtBeginDocument{%
+   \@ifundefined{NC@rewrite@X}{\newcolumntype{X}{}}{}% new column X if not exists
+   \expandafter\in@\expandafter\@arrayright\expandafter{\endarray}%
+   \ifin@ \let\tabu@endarray\endarray
+   \else \tabu@fix@arrayright \fi % <fix for colortbl & arydshln (delarray)>
+   \@ifpackageloaded{colortbl} \tabu@colortbltrue \tabu@colortblfalse
+}
+%    \end{macrocode}
+%
+% \subsection{Some constants}
+%
+%    \begin{macro}{\tabu@cnt}
+%
+%    Used in in \cs{tabu@arith} (the number of trials) and \cs{tabu@prepnext@tok} (for \cs{rowfont}).
+%
+%    \begin{macro}{\tabu@nbcols}
+%
+%    A counter that save the number of columns of the \textt{tabu}.
+%
+%    \begin{macro}{\tabu@X@cols}
+%
+%    Used only when \textt{tabu X} columns are used with ``\textt{tabu spread}''.
+%
+%    \begin{macrocode}
+\newcount\tabu@cnt
+\newcount\tabu@nbcols
+\newcount\tabu@X@cols
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@target}
+%
+%    Stores the \textt{tabu} target (either ``\textt{to}'' or ``\textt{spread}'').
+%
+%    \begin{macro}{\tabu@spreadtarget}
+%    \begin{macro}{\tabu@naturalX}
+%
+%     Used only when \textt{tabu X} columns are used with ``\textt{tabu spread}''.
+%
+%    \begin{macrocode}
+\newdimen\tabu@target
+\newdimen\tabu@spreadtarget
+\newdimen\tabu@naturalX
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabucolX}
+%
+%    The dimen corresponding to the preamble token \textt{X[1]}: the standard width of \textt X columns.
+%
+%    \begin{macro}{\tabu@X@sum}
+%
+%    Stores the sum of all width coefficients for \textt X columns.
+%
+%    \begin{macrocode}
+\newdimen\tabucolX
+\newdimen\tabu@X@sum
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+%    \begin{macro}{\iftabu@measuring}
+%
+%    This switch is set to \textt{true} by \cs{tabu@arith} if the trial did not reached the target.
+%
+%    It is also temporarily set to true when the first \textt X column is encountered in the \textt{tabu} preamble,
+%    at the time \cs{@mkpream} scans it to built the \cs{halign} preamble. The first \textt X column found
+%    actually triggers some special setup to be expanded before \cs{halign} (see the flow chart...)
+%
+%    \begin{macro}{\iftabu@spread}
+%
+%    A switch whether ``\textt{tabu spread}'' is used or not.
+%
+%    \begin{macro}{\iftabu@nested}
+%
+%    A swith set at the entry in \textt{tabu} environment: true if \textt{tabu} is nested inside another \textt{tabu}.
+%
+%    \begin{macro}{\iftabu@firstcline}
+%
+%    A switch to adapt \cs{tabucline} automatically if it comes first in the \textt{tabu} (similar to \cs{firsthline}).
+%
+%    \begin{macrocode}
+\newif\iftabu@measuring
+\newif\iftabu@spread
+\newif\iftabu@nested
+\newif\iftabu@firstcline
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@box}
+%
+%    Stores the whole \textt{tabu} when an attempt to adjust \textt X columns is performed.
+%
+%    It is also used by \cs{tabucline} to save the \cs{@arstrutbox} when inserting a horizontal line.
+%
+%    \begin{macrocode}
+\newsavebox\tabu@box
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@gobblespace}
+%
+%    A macro which is needed when scanning tokens with \cs{futurelet}.
+%
+%    \begin{macrocode}
+\def\tabu@gobblespace#1 {#1}
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@NC@rewrite@X}
+%
+%     This is the rewrite macro for \textt{tabu X} columns.
+%     Such a column has an optional argument: the width coefficient for the \textt{tabu X} column
+%     whose default value is 1, and may be some alignments parameters.
+%     The coefficient is used in the expression: \textt{p\M*{\cs{dimexpr}\meta{coef}\cs{tabucolX}}}
+%
+%    \begin{macrocode}
+\newcommand\tabu@NC@rewrite@X[1][]{\tabu@rewrite@X{#1}%
+                  \expandafter \NC@find \tabucolX@spec}
+%    \end{macrocode}
+%    \end{macro}
+%
+%  The next part of the definition (\cs{tabu@rewrite@X}) can be found page \pageref{tabu X column definition}.
+%
+%    \begin{macro}{\usetabu (new column type)}
+%
+%    \cs{usetabu} is defined as a new column type. \cs{NC@rewrite@\string\usetabu} is expanded
+%    where \cs{@mkpream} does its job.
+%
+%    \begin{macrocode}
+\expandafter\def\csname NC@rewrite@\string\usetabu\endcsname#1{%
+   \ifx\\#1\\\tabu@saveerr{}\else
+      \@ifundefined{tabu@saved@\string#1}
+         {\tabu@saveerr{#1}}
+         {\let\tabu@rewrite@X \tabu@rewrite@Xrestore
+         \def\tabu@temp{\xdef\tabu@usetabu{%
+            \col@sep \the\col@sep\relax
+            \arrayrulewidth \the\arrayrulewidth\relax
+            \@tempdima \ht\@arstrutbox \advance\@tempdima -\extrarowheight
+            \extrarowheight \the\extrarowheight\relax
+            \advance\@tempdima \extrarowheight
+            \ht\@arstrutbox \@tempdima
+            \extratabsurround \the\extratabsurround\relax
+            \doublerulesep \the\doublerulesep\relax}}%
+         \aftergroup \tabu@usetabu
+         \csname tabu@saved@\string#1\expandafter\endcsname}%
+   \fi
+}% \NC@rewrite@\usetabu
+\expandafter\def\csname NC@find@\string\usetabu\endcsname#1\usetabu{\NC@{#1}}
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@rewritefirst (new column type)}
+%
+%    This new column type is not really a column type! It is always added to a \textt{tabu} preamble
+%    in order to do some setup before any other column is rewritten by \cs{@mkpream}.
+%
+%    Thus, \cs{NC@do}\cs{tabu@rewritefirst} is added \textbf{at the beginning of} \cs{NC@list}
+%    at the entry of a (not nested) \textt{tabu} environment.
+%
+%    This ``column type'' sets up the new column type \cs{tabu@rewritelast} which is added to
+%    \textbf{at the end of} \cs{NC@list}, and defines the token \texttt X to be rewritten by
+%    \cs{tabu@NC@rewrite@X} (in case \xpackage{tabularx} is used with \thispackage, this modification
+%    of the \textt X column occurs only inside the group where \cs{@mkpream} does its job).
+%
+%    \begin{macrocode}
+\expandafter\def\csname NC@rewrite@\string\tabu@rewritefirst\endcsname{%
+   \ifx\tabu@lines\relax
+   \NC@list\expandafter{\expandafter\NC@do \expandafter\usetabu
+                        \NC@do X\NC@do\tabu@rewritelast}%
+   \else
+   \NC@list\expandafter{\expandafter\NC@do \expandafter\usetabu
+                        \expandafter\NC@do \expandafter|\tabu@NC@list
+                        \NC@do X\NC@do\tabu@rewritelast}%
+      \tabu@lines % defines NC@rewrite@| for tabu only (inside @mkpream group)
+   \fi
+   \let\save@decl \tabu@save@decl % inversion of tokens in text mode
+   \let\NC@rewrite@X \tabu@NC@rewrite@X
+   \aftergroup \tabu@global@temp
+   \aftergroup \tabu@firstcline
+   \NC@find \tabu@rewritelast
+}% NC@rewrite@\tabu@rewritefirst
+\expandafter\def\csname NC@find@\string\tabu@rewritefirst\endcsname
+                                          #1\tabu@rewritefirst{\NC@{#1}}
+\def\tabu@rewritefirst{%
+   \edef\tabu@NC@list{\the\NC@list}%
+   \NC@list{\NC@do \tabu@rewritefirst \NC@do *}%
+}% \tabu@rewritefirst
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@rewritelast (new column type)}
+%
+%    This new column type is rewritten after \textt X columns, because it is declared by
+%    when the column \cs{tabu@rewritefirst} is actually rewritten. In the case where \cs{tabu@target}
+%    is $>0$ (either because of ``\textt{tabu to}'' or ``\textt{tabu spread}'' has been called)
+%    and if there is no \textt X column, then \textt{@\M*{\cs{extracolsep}\cs{@flushglue}}} is added
+%    at the beginning of the preamble.
+%
+%    To avoid duplicate margin in the \textt{tabu} we have to test the next token in the preamble.
+%    If the next token is \textt\textbar\ or \textt !\ then no margin must be added and
+%    \textt{@\M*{\cs{extracolsep}\cs{@flushglue}}} can be inserted at the beginning of the preamble.
+%
+%    Otherwise, we must insert \textt{!\M*{\cs{extracolsep}\cs{@flushglue}}} in order to keep the margin.
+%
+%    \begin{macrocode}
+\expandafter\def\csname NC@rewrite@\string\tabu@rewritelast\endcsname{%
+   \global\NC@list\expandafter{\tabu@NC@list}%
+   \futurelet \tabu@temp \tabu@rewritelast
+}% \NC@rewrite@\tabu@rewritelast
+\expandafter\def\csname NC@find@\string\tabu@rewritelast\endcsname
+                                          #1\tabu@rewritelast{\NC@{#1}}
+\def\tabu@rewritelast{%
+   \ifx \@halignto\relax \let\tabu@temp \@empty
+   \else
+      \let\@halignto \tabu@halignto
+      \ifdim \tabu@target=\z@ \let\tabu@temp \@empty
+      \else
+         \if |\noexpand\tabu@temp \def\tabu@temp{@{\extracolsep\@flushglue}}\else
+         \if !\noexpand\tabu@temp \def\tabu@temp{@{\extracolsep\@flushglue}}\else
+                                  \def\tabu@temp{!{\extracolsep\@flushglue}}\fi\fi
+      \fi
+   \fi
+   \expandafter\NC@find \tabu@temp
+}% \tabu@rewritelast
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@everycr@tok}
+%    \begin{macro}{\iftabu@colortbl}
+%
+%    This token is used to store and restore the content of \cs{everycr} when \cs{rowfont} is used.
+%
+%    The switch \cs{iftabu@colortbl} is used by \cs{rowfont} when modifying the alignment, because
+%    \xpackage{colortbl} changes the glue put inside the \cs{halign} preamble to make standard alignments.
+%    This switch is set At Begin Document.
+%
+%    \begin{macrocode}
+\newtoks\tabu@everycr@tok
+\newif\iftabu@colortbl
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@nowrite}
+%
+%    A trick to fobidd \cs{write} when a trial is done on the \cs{halign}.
+%    (Copied from D. Carlisle's \xpackage{tabularx} code.)
+%
+%    \begin{macrocode}
+\def\tabu@nowrite{% cancels a \write command (tabularx method)
+   \begingroup
+     \def\let{\afterassignment\endgroup\toks@}%
+        \afterassignment\let\count@
+}% \tabu@nowrite
+\let\tabu@write\write
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@phantomline}
+%
+%    This macro inserts a phantom line in front of a \textt{tabu}.
+%    This is necessary when you use \cs{usetabu} with \textt{tabu X} column,
+%    with a single line containing \cs{multicolumn}...
+%
+%    \begin{macrocode}
+\def\tabu@phantomline{\noalign{%
+   \global\everycr{}%
+   \global\setbox\tabu@box\box\@arstrutbox
+   \toks@{}\count@\@ne
+   \@whilenum\count@<\tabu@nbcols\do{\advance\count@\@ne
+                        \toks@\expandafter{\the\toks@&}}%
+   \toks@\expandafter{\the\toks@
+      \cr\noalign{\global\setbox\@arstrutbox\box\tabu@box}}%
+   \expandafter}\the\toks@
+}% \tabu@phantomline
+%    \end{macrocode}
+%    \end{macro}
+%
+% \subsection{\cs{tabu} and \cs{endtabu}}
+%
+%    \begin{macro}{\tabu}
+%
+%    \cs{tabu} is the command of the environment.
+%
+%    \begin{macro}{\endtabu}
+%
+%    \cs{endtabu} is \cs{endtabular} or \cs{endarray} in math mode.
+%
+%    \begin{macrocode}
+\def\tabu{%
+   \ifmmode \def\endtabu{\endarray}%
+   \else    \def\endtabu{\endtabular}\fi
+   \tabu@setup \tabu@settarget
+}% \tabu
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@setup}
+%
+%    This macro sets the \textt{tabu X} column definition at the beginning of the \textt{tabu} environment.
+%
+%    Incidentally, \cs{tabu@X} (number of \textt{tabu X} columns) and \cs{tabu@X@sum} (sum of the width-coefs) are reset to $0$.
+%
+%    The current value of \cs{hfuzz} is stored in \cs{tabu@hfuzz}, with a minimum of $0.1 pt$.
+%
+%    \begin{macrocode}
+\def\tabu@setup{%
+   \let\adl@xarraydashrule \tabu@adl@xarraydashrule % <fix> arydshln
+   \let\adl@act@endpbox \tabu@adl@act@endpbox       % <fix> arydshln
+   \let\adl@act@@endpbox \tabu@adl@act@endpbox      % <fix> arydshln
+   \let\endarray \tabu@endarray          % <fix> colortbl & arydshln (delarray)
+   \let\tabu@global@temp \@empty \let\tabu@global@X \@empty
+   \ifx\verbatim \tabu@sanitizetext
+         \tabu@nestedtrue
+         \def\tabu@aligndefault{t}\def\tabudefaulttarget{\linewidth}%
+   \else \tabu@nestedfalse
+         \def\tabu@aligndefault{c}%
+         \ifdim\parindent>\z@ \ifx\linewidth\tabudefaulttarget
+         \everypar\expandafter{%                    % correction for indentation
+            \the\everypar\everypar\expandafter{\the\everypar}%
+            \setbox\z@=\lastbox
+            \ifdim\wd\z@>\z@ \advance\linewidth -\wd\z@\fi
+            \box\z@
+            }%
+         \fi\fi
+   \fi
+   \let\@footnotetext \tabu@footnotetext
+   \let\@xfootnotenext\tabu@xfootnotetext
+   \iftabu@nested\else
+      \global\tabu@footnotes{}%
+      \aftergroup\the\aftergroup\tabu@footnotes
+   \fi
+   \let\centering \tabu@centering
+   \let\raggedright \tabu@raggedright
+   \let\raggedleft \tabu@raggedleft
+   \let\@trivlist \tabu@trivlist           %<restore \\=\@centercr inside lists>
+   \let\tabudecimal \tabu@tabudecimal
+   \let\verbatim \tabu@sanitizetext
+   \let\fbox \tabu@fbox
+   \let\prepnext@tok \tabu@prepnext@tok            % <for rowfont and tabucline>
+   \let\rowfont \tabu@rowfont
+   \tabu@spreadfalse \tabu@measuringfalse
+   \edef\tabu@hfuzz{\ifdim\hfuzz<.1\p@ .1\p@\else\the\hfuzz\fi}%
+   \tabu@rewritefirst
+}% \tabu@setup
+\def\tabu@save@decl{% no inversion on tokens when not in math mode
+   \ifcat$\d@llarend
+      \toks\count@\expandafter\expandafter\expandafter{%
+               \expandafter\@nextchar \the\toks\count@}%
+   \else
+      \toks\count@\expandafter\expandafter\expandafter{%
+         \expandafter\the\expandafter\toks\expandafter\count@\@nextchar}%
+   \fi
+}% \tabu@save@decl
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@settarget}
+%    \begin{macro}{\tabu@begin}
+%
+%    The macro sets \cs{tabu@target} (a dimen) to the value specified for ``\textt{tabu to}'' or ``\textt{tabu spread}''.
+%
+%    \begin{macrocode}
+\def\tabu@settarget{\futurelet\@let@token \tabu@sett@rget}
+\def\tabu@sett@rget{\tabu@target\z@
+   \ifcase \ifx \bgroup\@let@token 0\else
+           \ifx [\@let@token 0\else
+           \ifx \@sptoken\@let@token 1\else
+           \if t\@let@token 2\else
+           \if s\@let@token 3\else
+           \m@ne\fi\fi\fi\fi\fi\relax
+       \expandafter\tabu@begin
+   \or \expandafter\tabu@gobblespace\expandafter\tabu@settarget
+   \or \expandafter\tabu@to
+   \or \expandafter\tabu@spread
+   \else\expandafter\tabu@begin
+   \fi
+}% \tabu@sett@rget
+\def\tabu@to to{\def\@halignto{to}\tabu@gettarget}
+\def\tabu@spread spread{\tabu@spreadtrue\def\@halignto{spread}\tabu@gettarget}
+\def\tabu@gettarget{\afterassignment\tabu@begin\tabu@target}
+\def\tabu@begin#1#{%
+   \edef\@halignto{\ifdim\tabu@target>\z@ \@halignto\the\tabu@target\fi}%
+   \let\tabu@halignto \@halignto
+   \expandafter\@testopt\expandafter\tabu@@begin \tabu@aligndefault #1\@nil
+}% \tabu@begin
+\def\tabu@@begin[#1]#2\@nil#3{%
+   \edef\tabu@align{#1}%
+   \edef\tabu@saved{%
+      \ifmmode \col@sep \the\arraycolsep
+      \else    \col@sep \the\tabcolsep     \fi\relax
+      \arrayrulewidth \the\arrayrulewidth\relax
+      \extrarowheight \the\extrarowheight\relax
+      \extratabsurround \the\extratabsurround\relax
+      \doublerulesep \the\doublerulesep\relax}%
+   \expandafter\def\expandafter\tabu@saved\expandafter{\tabu@saved
+            \tabu@temp \edef\tabu@halignto{to\the\tabu@target}\NC@find #3}%
+   \ifmmode \expandafter\array
+   \else    \expandafter\tabular
+   \fi      [{#1}]#2{\tabu@rewritefirst #3}%
+}% \tabu@@begin
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@footnotes}
+%
+%    \begin{macrocode}
+\newtoks\tabu@footnotes
+\long\def\tabu@footnotetext#1{%
+   \edef\@tempa{\the\tabu@footnotes
+      \noexpand\footnotetext [\the\csname c@\@mpfn\endcsname]}%
+   \global\tabu@footnotes\expandafter{\@tempa{#1}}}%
+\long\def\tabu@xfootnotetext[#1]#2{%
+  \global\tabu@footnotes\expandafter{\the\tabu@footnotes
+                           \footnotetext[{#1}]{#2}}}
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%
+% \subsection{Flow chart of expansion} ^^A\enlargethispage{\baselineskip}
+%
+% \subsubsection(case: tabu, tabu to and tabu spread){General case: tabu, tabu to and tabu spread}
+%
+% {
+% \hskip-\evensidemargin
+% \begin{tikzpicture}[yscale=.4,xscale=.6,framed,
+%    start chain, every join/.style={->,thin,black,solid},node distance=.5cm and .5cm,
+%    every node/.style={black}]
+% \node [on chain,draw] (begintabu) at (0,0) {\cs{begin}\M*{tabu}} node [anchor=west] at (begintabu.east) {(\cs{begingroup})}
+%  node [on chain=going below,join] (tabu) {\cs{tabu}}
+%  node [on chain=going right,join] (tabudesc) {$\begin{tabu}\{{>{$}l<{$}}.
+%                                                 defines \cs{@halignto} and sets \cs{tabu@target} \\
+%                                                 load \cs{NC@rewrite@X} for \textt{tabu} \textt X columns \\
+%                                                 load special setup (\xpackage{arydshln} fixes, \cs{rowfont}, \cs{centering} etc)
+%                                                \end{tabu}$}
+%  node [on chain=going below,join] (tabu@begin) {\cs{tabu@begin}}
+%  node [on chain] (tabu@begindesc) {$\begin{tabu}\{{>{$}l<{$}}.
+%                                    if \cs{tabu@target} $> 0$ then prepare \\
+%                                   \textt{@\M*{\cs{extracolsep}\M*{\cs{@flushglue}}}}
+%                                   \end{tabu}$};
+%  \chainin (tabu@begin)
+%  node [on chain=going below] (H) {}
+%  node [on chain=going below,join=with tabu@begin] (toarray) {\cs{tabular} or \cs{array} if in math mode};
+%  \draw [densely dotted,gray,very thick] (begintabu.west |- H) -- (tabu@begindesc.east |- H) coordinate (H);
+%  \path [fill=AliceBlue] (begintabu.north -| H) rectangle ($(H)+(1,0)$) coordinate (bluebox)
+%                                           node [midway,rotate=-90] {\large\thispackage};
+%
+%  { [start chain=array]
+%  \node [on chain] at (begintabu |- toarray) [yshift=-2.5cm] (@array) {\cs{@array}};
+%  \draw [->] (toarray.west) -| (@array);
+%  \node [on chain=going right,join,fill=GhostWhite,draw=gray,dashed] (@arraydesc)
+%                 {\begin{tabu}\{{l}.
+%                    creates the \cs{@arstrutbox} \\
+%                    \cs{begingroup} \\
+%                    \quad \cs{@mkpream}: parse the preamble to create \cs{@preamble}  \\
+%                    \quad \cs{xdef} \cs{@preamble} macro \\
+%                    \cs{endgroup}\\
+%                    \cs{@arrayleft}\\
+%                    \cs{vtop} or \cs{vbox} or \cs{vcenter} \cs{bgroup} ... \cs{halign}\{ preamble...
+%                 \end{tabu}}
+%  node [on chain=going below] (H) {};
+%  }
+%  { [start chain=endtabu]
+%  \node [on chain] (end{tabu}) at (begintabu |- H) {\cs{end}\M*{tabu}}
+%   node [on chain=going below,join] (endtabu) {\cs{endtabu}}
+%   node [on chain=going right,join] (endtabular) {\cs{endtabular}}
+%   node [on chain=going right,join] (endarray) {\cs{endarray}}
+%   node [on chain=going right,join] (endarraydesc) {\begin{tabu}\{{l}. end of \cs{halign} \\ end of \cs{vtop}, \cs{vbox} or \cs{vcenter}\end{tabu}};
+%   \chainin (endtabular)
+%   node [on chain=going below,node distance=.7cm] (H) {};
+%   \node at (H -| endarraydesc.west) [anchor=west] (endtabulardesc) {\begin{tabu}\{{l}. end of math group \\ end of \cs{hbox}\end{tabu}};
+%   \draw [->] (endtabular) |- (endtabulardesc) node [near end,above] {\small if in text mode};
+%   \draw [->] (endtabu.north east) to [bend left,looseness=.5] node [midway,above] {\small if in math mode} (endarray.north);
+%   \node at (endtabulardesc.south -| begintabu) [yshift=-.5cm] (endgroup) {\cs{endgroup}} node at (endgroup.east) [anchor=west] {end of envir};
+%   \draw [->] (endtabu) -- (endgroup);
+%  }
+%  \path [fill=LightGoldenrodYellow] (bluebox) rectangle ($(endtabulardesc.south -| bluebox)-(1,0)$)
+%                 node [midway,rotate=-90] {\large\xpackage{array}};
+% \end{tikzpicture}
+% }
+%
+% \subsubsection(tabu to with X column){\textt{tabu to} with \textt X column}
+%
+% The important part of the job is made inside the dashed box above: \cs{@mkpream}
+% expands the columns definitions, which can be user defined. Hopefully, it does its
+% job inside a group, therefore a user-column can set a macro to be expanded
+% \cs{aftergroup}. This implementation allows much modifications in the tabular preparation,
+% without any change in the macros of \xfile{array.sty}.
+%
+% When a \textt{tabu X} column is found in the preamble  by \cs{@mkpream}, \textt{tabu} changes his strategy: the macro
+% \cs{tabu@prep@TRIAL} is set to be expanded \cs{aftergroup} that is, just after the preamble (\cs{@preamble}) has been built.
+% This macro does some setup for \textt{tabu} trials to reach the target with variable \textt X column widths and gobbles
+% everything until the next \cs{bgroup} which corresponds to the \cs{vtop}, \cs{vbox} or \cs{vcenter} for the whole tabular.
+% This part of \cs{@array} is stored into \cs{tabu@Xfinish} to be expanded after the last trial gave satisfaction
+% to reach the \textt{tabu} target. Then \cs{tabu@collect} is expanded to find the end of the \textt{tabu} environment,
+% temporarily storing the environment content into a token register.
+%
+% The last part of \cs{@array} until \cs{halign} is expanded inside a \cs{vbox}
+% which is stored into the box register \cs{tabu@box} for measuring purpose. \cs{halign} ends by \cs{endarray}
+% which stops the \cs{tabu@box} as well, and then \cs{tabu@arith} is expanded to compute the gap between the
+% width of \cs{tabu@box} and the target, and \cs{tabucolX} (the dimension that correspond to \textt{X[1]})
+% is updated accordingly.
+%
+% The trials are ``protected'' by\, \M*{\cs{ifnum}0=`}\cs{fi}\, : they occur in a group that will be closed
+% at the very begining of \cs{tabu@Xfinish}, when the final tabular will be printed actually.
+% This protection is absolutely necessary to be able to collect
+% the environment body in the case of nested \textt{tabu} with \textt X columns. This is related to \TeX{}
+% mechanism of expansion inside \cs{halign} (\TeX{} stops reading when it encounters a \& \textt{alignment tab character}
+% and goes backward expanding anything that were not expanded before).
+%
+%
+% {\hskip-1cm
+% \begin{tikzpicture}[yscale=.4,xscale=.6,framed,
+%       start chain=going below,node distance=.3cm and .5cm,
+%       every join/.style={->,thin,black,solid},every node/.style={black}]
+%
+% \node [on chain] (begingroup) at (0,0) {\cs{begingroup}}
+%    node [on chain=going right] (@mkpream) {\cs{@mkpream}}
+%    node [on chain,join] {Finds a \textt X column}
+%    node [on chain,join] {rewrite \textt X column}
+%       {[start branch] node [on chain] {\begin{tabu}\{{l}. Parse the optional parameter for \textt X\\ Set \cs{aftergroup}\cs{tabu@prep@TRIAL}\end{tabu}}
+%       }
+%    node [on chain,join] {... \cs{@mkpream} ...}
+%       {[start branch] node [on chain,join] {builds the \cs{halign} preamble}}
+%    node [on chain,join] {\cs{xdef}\cs{@preamble}}
+%    node [on chain,join] (endgroup) {\cs{endgroup}}
+%    node [on chain] (H) {};
+% \node (tabu@prep@TRIAL) at (begingroup |- H) {\cs{tabu@prep@TRIAL}};
+% \draw [->] (endgroup.west) -| (tabu@prep@TRIAL.north) node [midway,left] {\ssmall\begin{tabu}{c} triggered by\\ \cs{aftergroup}\end{tabu}};
+% \chainin (tabu@prep@TRIAL);
+%    {  [start branch] \node [on chain,join] {\cs{tabu@setup@TRIAL}}
+%                       node [on chain,join] {\begin{tabu}\{{l}.
+%                                                 Neutralisation of \cs{write}  \\
+%                                                 Protection for: \begin{tabu}{!{\textbullet}l}
+%                                                                 footnotes \\ counters \\ index
+%                                                                 \end{tabu}
+%                                              \end{tabu}};
+%    }
+% \node [on chain] (H) {}
+%    node [on chain,join=with tabu@prep@TRIAL] (tabu@arrayleft@measure) {\cs{tabu@arrayleft@measure}}
+%    node [on chain=going right,join] {\begin{tabu}\{{l}. prepares \cs{tabu@Xfinish} \\ Collect the \textt{tabu} body\end{tabu}}
+%    node [on chain,join] (tabu@TRIAL) {\cs{tabu@TRIAL}}
+%       {[start branch] node [on chain,join] {\begin{tabu}{l} Expands \cs{halign} into a \cs{vbox} \end{tabu}}
+%       }
+%    node [on chain,join] {\cs{tabu@endTRIAL}}
+%       {[start branch] node [on chain,join] {\cs{endarray}}
+%       }
+%    node [on chain,join] (tabu@arith) {\begin{tabu}{c} \cs{tabu@arith}\\ \cs{wd}\M*{tabu}$-$\cs{tabu@target} $<$ \cs{hfuzz} ?\end{tabu}}
+%    node [on chain=going right,node distance=1cm] (tabu@Xfinish) {\cs{tabu@Xfinish}};
+%    \draw (tabu@arith) [->] -- (tabu@Xfinish) node [midway,above,blue] {Yes};
+%    \draw [->] (tabu@arith.west) |- (tabu@TRIAL) node (No) [very near start,left] {{\small\begin{tabu}.{r}\} Updates \\ \cs{tabucolX}\end{tabu}} \textcolor{red}{No}};
+%
+% \end{tikzpicture}}
+%
+%
+%
+%
+%
+% \subsubsection(tabu spread with X column){\textt{tabu spread} with \textt X column}
+%
+% In the case of ``\textt{tabu spread}'' with \textt X columns, the process is the same
+% as the one described for ``\textt{tabu to}'' with \textt X columns. However, the first
+% trial is different because we have first to measure the \emph{natural width} of the
+% tabular.
+% The process is the following:
+% \begin{itemize}[label=\small\textbullet]
+% \item \cs{tabu@target} is first set to \cs{linewidth} (or \cs{linegoal} with the \textt{linegoal} package option).
+% \item The \textt X column corresponds to a \cs{vbox} with \cs{hsize} fixed to \cs{tabu@target}.
+% \item Inside this \cs{vbox} the cell content is written into a \cs{hbox} whose width is limited to \cs{tabu@target}.
+%       This \cs{hbox} is captured into the box register \cs{tabu@box}.
+% \item At the end of the cell, the \cs{badness} of the \cs{hbox} is checked:
+%        \begin{itemize}[label=\textendash,leftmargin=*]
+%        \item if the \cs{badness} is $> 1000$ then the text is too long and ``\textt{tabu spread}''
+%        is useless: \textt{tabu to \cs{tabu@target}} give the same result.
+%        \item Otherwise, we get the natural width of the cell content by: \\
+%              \cs{setbox} \cs{tabu@box} \cs{hbox} \M*{\cs{unhbox} \cs{tabu@box}}
+%        \end{itemize}
+% \item At the end of the first trial, \cs{tabu@spreadarith} checks if:
+%         $$ \text{width(tabular)} + \text{spread} < \cs{linewidth} \text{ (or \cs{linegoal})}$$
+%      \begin{itemize}[label=\textendash,leftmargin=*]
+%      \item if not, then \textt{tabu to}\cs{tabu@target} give the same result
+%      \item Otherwise, the target for \textt{tabu to} will be:
+% $$\hskip-\leftmargin
+% \text{width(tabular)} + \text{spread} - \sum_i \text{natural widths X}_i
+% +\underbrace{\text{Max}_i\left(\dfrac{\text{natural width X}_i}{\text{coef}_i}\right)\times \sum_i\text{coef}_i}
+%      _{\text{\begin{tabu}{c} minimal natural width that can be obtained \\ with the given coefs\end{tabu}}}
+% $$
+%      \end{itemize}
+%  And the next trial will be done as if the user called ``\textt{tabu to}'' with this target.
+% \end{itemize}
+%
+%
+%
+%
+% \subsection{tabu X column definition}
+% \label{tabu X column definition}
+%
+%    \begin{macro}{\tabu@rewrite@X}
+%
+%    This macro is expanded by \cs{@mkpream} in case a \textt X column is found.
+%
+%    \cs{tabu@X@sum} (a dimen) store the sum of the width coefficients. For the first \textt{X column} found in the
+%    preamble, a special setup occurs:
+%    \begin{itemize}[itemsep=0pt,topsep=0pt,leftmargin=*]
+%    \item the default target (either \cs{linewidth} or \cs{linegoal} if available) is set
+%          if it has not been specified by the user.
+%    \item \cs{@halignto} is \cs{let} to \cs{relax} to avoid its expansion in \cs{xdef}\cs{@preamble} just after \cs{@mkpream}.
+%           Indeed as long as we have to measure the natural width of the tabular, \cs{@halign} must be empty for trial steps.
+%    \item The rest of the setup is made \cs{aftergroup} (\ie after \cs{xdef}\cs{@preamble} which occurs inside a group) by \cs{tabu@prep@TRIAL}.
+%    \end{itemize}
+%
+%    \begin{macrocode}
+\def\tabu@rewrite@X#1{\tabu@Xarg{#1}%
+   \iftabu@spread \tabu@rewrite@Xspread
+   \else          \tabu@rewrite@Xto
+   \fi
+}% \tabu@rewrite@X
+%    \end{macrocode}
+%    \begin{macro}{\tabu@rewrite@Xnested}
+%
+%    This macro replaces \cs{tabu@rewrite@X} when \textt{tabu} makes a trial for \textt X columns.
+%
+%    \begin{macro}{\tabu@rewrite@Xrestore}
+%
+%    This macro replaces \cs{tabu@rewrite@X} in the case of \cs{usetabu}.
+%
+%    \begin{macrocode}
+\def\tabu@rewrite@Xnested#1{\def\tabucolX@spec{p{\tabucolX}}}
+\def\tabu@rewrite@Xrestore#1{\tabu@Xarg{#1}\let\tabucolX@spec\tabu@temp
+   \iftabu@measuring \else \tabu@measuringtrue \aftergroup\tabu@usetabuX \fi}%
+\def\tabu@usetabuX{%
+   \tabu@everycr\expandafter{\the\tabu@everycr\tabu@phantomline}%
+}% \tabu@usetabuX
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@rewrite@Xto}
+%
+%    The setup for trial is not the same in case of ``\textt{tabu to}'' and ``\textt{tabu spread}''.
+%
+%    The important thing is:\, \cs{aftergroup}\cs{tabu@prep@TRIAL}.
+%
+%    \begin{macrocode}
+\def\tabu@rewrite@Xto{%
+   \iftabu@measuring % not the first X column found in preamble
+      \xdef\tabu@global@X {\tabu@global@X
+         \advance\tabu@X@sum \the\tabu@X@sum\relax}%
+   \else % first X column found in preamble
+      \tabu@measuringtrue
+      \ifdim\tabu@target=\z@
+         \setlength \tabu@target \tabudefaulttarget
+      \fi
+      \xdef\tabu@global@X{%
+         \tabu@X@sum \the\tabu@X@sum\relax
+         \tabu@target \the\tabu@target\relax}%
+      \let \@halignto \relax
+      \aftergroup \tabu@prep@TRIAL
+   \fi
+}% \tabu@rewrite@Xto
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@rewrite@Xspread}
+%
+%    This macro is used instead of \cs{tabu@rewrite@Xto} for \textt X columns with ``\textt{tabu spread}''.
+%
+%    \begin{macrocode}
+\def\tabu@rewrite@Xspread{% tabu spread with X columns: we need to store each coef
+   \iftabu@measuring % not the first X column found in preamble
+      \advance\tabu@X@cols \@ne
+      \expandafter\let\csname tabu@X\the\tabu@X@cols\endcsname \relax
+      \xdef\tabu@global@X {\tabu@global@X
+            \advance\tabu@X@cols\@ne
+            \advance\tabu@X@sum \the\tabu@X@sum\relax
+            \def\csname tabu@X\the\tabu@X@cols\endcsname{\strip@pt\tabu@X@sum}}%
+   \else % first X column found in preamble
+      \tabu@measuringtrue
+      \tabu@X@cols \@ne  \tabu@spreadtarget=\tabu@target
+      \setlength \tabu@target \tabudefaulttarget
+      \expandafter\let\csname tabu@X\the\tabu@X@cols\endcsname \relax
+      \xdef\tabu@global@X {%
+         \tabu@X@cols \@ne
+         \tabu@X@sum \the\tabu@X@sum\relax
+         \tabu@target \the\tabu@target\relax
+         \tabu@spreadtarget \the\tabu@spreadtarget\relax
+         \def\csname tabu@X\the\tabu@X@cols\endcsname{\strip@pt\tabu@X@sum}}%
+      \let\@halignto \relax
+      \aftergroup \tabu@prep@TRIAL
+   \fi
+}% \tabu@rewrite@Xspread
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@Xarg}
+%
+%    A tedious (and fastidious) macro to parse the optional argument of \textt X columns. The aim is to built
+%    \cs{tabucolX@spec} which expands to the column specification:
+%
+%    {\centering \textt{>\M*{alignment} p \emph{or} m \emph{or} b \M*{\cs{dimexpr} coef \cs{tabucolX}\cs{relax}}}\par}
+%
+%    After that \xfile{array.sty} make it easy:\, \cs{expandafter}\cs{NC@find}\cs{tabucolX@spec}
+%
+%    \begin{macrocode}
+\def\tabu@Xarg#1{%
+   \ifx\\#1\\%    <shortcut when no option>
+      \tabu@X@sum \p@
+      \def\tabucolX@spec{p{\tabucolX}}%
+      \edef\tabu@temp{p{\the\tabucolX}}%  <required for \usetabu>
+   \else
+      \tabu@X@sum \z@
+      \let\tabucolX@align \@empty
+      \let\tabucolX@spec \@empty
+      \let\tabu@Xmath \relax
+      \tabu@Xparse {}#1\relax\@nnil
+   \fi
+}% \tabu@Xarg
+\def\tabu@Xparse#1{\futurelet\@let@token\tabu@Xtest}
+\expandafter\def\expandafter\tabu@Xparsespace\space{\tabu@Xparse{}}
+\def\tabu@Xtest{%
+   \ifcase \ifx \@nnil\@let@token \z@ \else
+           \ifx \relax\@let@token \m@ne\else
+           \if ,\@let@token \m@ne\else
+           \if p\@let@token 1\else
+           \if m\@let@token 2\else
+           \if b\@let@token 3\else
+           \if l\@let@token 4\else
+           \if c\@let@token 5\else
+           \if r\@let@token 6\else
+           \if .\@let@token 7\else
+           \ifx \@sptoken\@let@token 8\else
+           \if L\@let@token 9\else
+           \if C\@let@token 10\else
+           \if R\@let@token 11\else
+           \ifcat $\@let@token 12\else
+           13\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\relax
+       \tabucolX@do \expandafter\remove@to@nnil
+   \or \tabu@Xcolspec{p}%
+   \or \tabu@Xcolspec{m}%
+   \or \tabu@Xcolspec{b}%
+   \or \tabu@Xalign{>{\raggedright}}%
+   \or \tabu@Xalign{>{\centering}}%
+   \or \tabu@Xalign{>{\raggedleft}}%
+   \or \expandafter\tabu@Xcoef
+   \or \expandafter\tabu@Xparsespace
+   \or \tabu@Xalign{>{\RaggedRight}}%
+   \or \tabu@Xalign{>{\Centering}}%
+   \or \tabu@Xalign{>{\RaggedLeft}}%
+   \or \let\tabu@Xmath=$\expandafter\tabu@Xparse
+   \or \tabu@Xcoef{}%
+   \else \expandafter\tabu@Xparse
+   \fi
+}% \tabu@Xtest
+\def\tabu@Xalign#1{%
+   \ifx \tabucolX@align\@empty \else \PackageWarning{tabu}
+      {Duplicate horizontal alignment specification}\fi
+   \def\tabucolX@align{#1}\expandafter\tabu@Xparse
+}% \tabu@Xalign
+\def\tabu@Xcolspec#1{%
+   \ifx\tabucolX@spec\@empty\else \PackageWarning{tabu}
+      {Duplicate vertical alignment specification}\fi
+   \def\tabucolX@spec{#1}\expandafter\tabu@Xparse
+}% \tabu@Xcolspec
+\def\tabu@Xcoef#1{\def\@tempa{#1}%
+   \afterassignment\tabu@Xc@ef \tabu@cnt
+}% \tabu@Xcoef
+\def\tabu@Xc@ef{%
+   \advance\tabu@X@sum \@tempa\the\tabu@cnt\p@
+   \tabu@Xparse{}%
+}% \tabu@Xc@ef
+\def\tabucolX@do{%
+   \ifx\tabucolX@spec\@empty \def\tabucolX@spec{p}\fi
+   \ifdim \tabu@X@sum=\z@ \tabu@X@sum \p@\fi
+   \begingroup
+      \ifx \tabu@Xmath\relax
+         \edef\tabucolX@spec##1{\tabucolX@spec{##1}}%
+      \else
+         \edef\tabucolX@spec##1{>{$}\tabucolX@spec{##1}<{$}}%
+      \fi
+      \edef\tabu@temp{\dimexpr\strip@pt\tabu@X@sum \tabucolX \relax}%
+      \toks@\expandafter{\tabucolX@align}%
+      \edef\x{%
+         \def\noexpand\tabu@temp{\the\toks@ \tabucolX@spec{\the\tabu@temp}}%
+         \def\noexpand\tabucolX@spec{\the\toks@ \tabucolX@spec{\tabu@temp}}%
+      }\expandafter\endgroup\x
+}% \tabucolX@do
+%    \end{macrocode}
+%    \end{macro}
+%
+% \subsection(Before trials){Before trials to reach the target}
+%
+% \subsubsection{Trial setup after \cs{@mkpream}}
+%
+%    \begin{macro}{\tabu@prep@TRIAL}
+%
+%    \cs{@mkpream} does its job inside a semi-simple group. At the end, \cs{@preamble} is expanded with \cs{xdef}, and
+%    the group is left: this triggers the expansion of \cs{tabu@prep@TRIAL} set \cs{aftergroup} by the first \textt X column
+%    encountered in the preamble.
+%
+%    We \cs{let} \cs{@halignto} to \cs{@empty}: it's a measurement, and put some protections. A group is opened with
+%    the famous \M*{\cs{ifnum}0=`}\cs{fi} and control is given to \cs{tabu@arrayleft@measure}.
+%
+%    \begin{macrocode}
+\def\tabu@prep@TRIAL{%
+   \let\tabu@savedpreamble \@preamble
+   \def\savetabu {\tabu@saveX}%
+   {\ifnum0=`}\fi
+      \tabu@setup@TRIAL
+      \iftabu@spread % first trial only
+         \advance\tabu@X@cols \@ne
+         \expandafter\let\csname tabu@X\the\tabu@X@cols\endcsname \@undefined
+         \tabu@X@cols \z@ \tabu@naturalX \z@ \tabucolX \z@
+         \let\tabu@naturalX@max \z@
+         \let\tabu@naturalX@min \z@
+         \let\tabu@startpboxORI \@startpbox
+         \let\@startpbox \tabu@spread@startpbox
+      \else
+         \tabucolX = \tabu@target
+      \fi
+      \tabu@cnt \z@  % number of trials
+      \def\tabu@lasttry{\m@ne\p@}%
+      \tabu@arrayleft@measure
+}% \tabu@prep@TRIAL
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\def\tabu@setup@TRIAL{\tabu@global@X
+   \let\tabu@rewrite@X \tabu@rewrite@Xnested
+   \def\tabudefaulttarget{\linewidth}%
+   \def\@elt##1{\global\value{##1}\the\value{##1}\relax}%
+   \xdef\tabu@global@X {\cl@@ckpt}\let\@elt \relax
+   \hbadness\@M \hfuzz\maxdimen
+   \let\hbadness \@tempcnta
+   \let\hfuzz \@tempdima
+   \let\write \tabu@nowrite
+   \let\@footnotetext\@gobble
+   \let\tabu@saveX \@gobble
+   \tabu@TRIAL@hook
+}% \tabu@setup@TRIAL
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabuDisableCommands}
+%
+%
+%
+%    \begin{macrocode}
+\let\tabu@TRIAL@hook\@empty
+\newcommand\tabuDisableCommands[1]{\g@addto@macro\tabu@TRIAL@hook{#1}}
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@arrayleft@measure}
+%
+%    Measuring the whole tabular occurs just before \cs{@arrayleft}.
+%    Hence the name of the macro: \cs{tabu@arrayleft@measure}.
+%
+%    \begin{macrocode}
+\def\tabu@arrayleft@measure#1\bgroup{%
+  \def\tabu@Xfinish{\ifnum0=`{\fi}\tabu@global@X
+         \let\@halignto\tabu@halignto \tabu@firstclinetrue  #1\bgroup}%
+  \toks@{\let\@preamble\tabu@savedpreamble}% <required for multicolumn>
+  \tabu@collect
+}% \tabu@arrayleft@measure
+%    \end{macrocode}
+%    \end{macro}
+%
+% \subsubsection(Collecting the tabu body){Collecting the \textt{tabu} body: required for \texttbf X columns}
+%
+%    \begin{macro}{\tabu@collect}
+%    \begin{macro}{\tabu@collectbody}
+%
+%    The mechanism is the same as \hologo{AmS}-\cs{collect@body} (also defined in \xfile{environ.sty}).
+%    The content of the tabular is captured inside \cs{toks@}, expanded by \cs{tabu@TRIAL}.
+%
+%    \begin{macrocode}
+\def\tabu@collect{\catcode`\^^@=13\def\tabu@stack{b}\tabu@collectbody}
+\long\def\tabu@collectbody#1\end#2{%
+   \edef\tabu@stack{\tabu@pushbegins #1\begin\end\expandafter\@gobble\tabu@stack}%
+   \ifx\tabu@stack\@empty
+      \toks@\expandafter{\the\toks@#1}\def\tabu@endenvir{\end{#2}}%
+      \expandafter\tabu@TRIAL
+   \else
+      \toks@\expandafter{\the\toks@#1\end{#2}}%
+      \expandafter\tabu@collectbody
+   \fi
+}% \tabu@collectbody
+\long\def\tabu@pushbegins#1\begin#2{\ifx\end#2\else b\expandafter\tabu@pushbegins\fi}
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+%
+% \subsection{Measuring the \textt{tabu}}
+%
+% \subsubsection{One trial after another}
+%
+%
+%    \begin{macro}{\tabu@TRIAL}
+%    \begin{macro}{\tabu@endTRIAL}
+%
+%    \cs{halign} is temporarily expanded inside a \cs{vbox} which is captured in \cs{tabu@box}.
+%
+%    At the end of the trial, we call \cs{tabu@arith} to compute the widths. \cs{tabu@arith} exits
+%    leaving \cs{iftabu@measuring} equal to \cs{iftrue}: a further trial is necessary, or equal to
+%    \cs{iffalse}: the target is reached, \cs{tabu@Xfinish} can print the \textt{tabu} in a last
+%    expansion of \cs{halign}.
+%
+%    \begin{macrocode}
+\def\tabu@TRIAL{\setbox\tabu@box \hbox\bgroup $\@arrayleft\vbox\bgroup \the\toks@
+                                 \tabu@endTRIAL}% constant
+\def\tabu@endTRIAL{\endarray$\egroup
+   \iftabu@spread \tabu@spreadfalse
+      \let\@startpbox \tabu@startpboxORI
+      \tabu@spreadarith % <only once>
+   \else \tabu@arith
+   \fi
+   \iftabu@measuring \tabu@measuringfalse
+         \expandafter \tabu@TRIAL % <continue trials>
+   \else
+         \toks@\expandafter\expandafter\expandafter{%
+               \the\expandafter\toks@ \tabu@endenvir}%
+         \expandafter \tabu@Xfinish \the\toks@ % <we are then!>
+   \fi
+}% \tabu@endTRIAL
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+% \subsubsection{The arithmetic of \textt X columns}
+%
+%    \begin{macro}{\tabu@arith}
+%    \begin{macro}{\tabu@spreadarith}
+%
+%    Algorithms.
+%
+%    \begin{macrocode}
+\def\tabu@arith{%
+   \advance\tabu@cnt \@ne
+   \ifdim \tabu@lasttry=\wd\tabu@box
+      \tabu@message{\tabu@header Reached minimum width. Backing up}%
+   \else
+      \edef\tabu@lasttry{\the\wd\tabu@box}%
+      \tabu@message{\tabu@message@arith}%
+      \ifdim \dimexpr \wd \tabu@box - \tabu@target <\tabu@hfuzz
+         \tabu@message{\tabu@message@reached}%
+         \xdef\tabu@global@X {\tabu@target\the\tabu@target\relax \tabu@global@X
+                              \tabucolX \the\tabucolX\relax}%
+      \else
+         \advance\tabucolX -\dimexpr(\wd\tabu@box-\tabu@target-\tabu@X@sum/65536)
+                              *65536/\tabu@X@sum\relax
+         \ifdim \tabucolX<\z@
+            {\let\write\tabu@write\PackageWarning{tabu}
+               {X Columns too narrow (table too wide)\MessageBreak}}%
+               \tabucolX=1em%
+         \else \tabu@measuringtrue
+         \fi
+      \fi
+   \fi
+}% \tabu@arith
+\def\tabu@spreadarith{%
+   \tabu@naturalX \tabu@naturalX@max\relax
+   \tabucolX \tabu@naturalX@min\relax
+   \tabu@message{\tabu@message@spread}%
+   \ifdim \dimexpr \wd\tabu@box + \tabu@spreadtarget <\tabu@target
+      \advance\tabu@spreadtarget \dimexpr\wd\tabu@box-\tabu@naturalX+\tabucolX\relax
+      \ifdim \tabu@spreadtarget <\tabu@target
+         \tabu@target = \tabu@spreadtarget
+      \fi
+      \tabu@message{\expandafter\tabu@msg@align \the\tabu@target {}{}{}{}{}\@@}%
+      \tabu@message{\ifdim \tabu@spreadtarget>\tabu@target
+                           (tabu) default target used.\fi}%
+   \else
+      \tabu@message{\expandafter\tabu@msg@align \the\tabu@target { }{}{}{}{}\@@}
+      \tabu@message{(tabu)\ifdim\wd\tabu@box<\tabu@target spread too large\else
+                                                 tabu spread is useless here\fi,
+                    default target used.}%
+   \fi
+   \xdef\tabu@halignto {to\the\tabu@target}%
+   \tabucolX \tabu@target
+   \tabu@measuringtrue
+}% \tabu@spreadarith
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+% \subsubsection(\xext{log} report){Reporting in the \xext{log} file (\textt{debugshow option})}
+%
+%    \begin{macro}{\tabu@message@arith}
+%    \begin{macrocode}
+\def\tabu@message@arith{\tabu@header
+   \expandafter\tabu@msg@align \the\tabucolX { }{ }{ }{ }{}\@@
+   \expandafter\tabu@msg@align \the\wd\tabu@box { }{ }{ }{ }{}\@@
+   \expandafter\tabu@msg@align \the\tabu@target { }{ }{ }{ }{}\@@
+   \expandafter\tabu@msg@align \the\tabu@X@sum {}{}{}{}{}\@@
+   \expandafter\tabu@msg@align \the\dimexpr(\tabu@target-\wd\tabu@box)
+                                      *65536/\tabu@X@sum\relax {}{}{}{}{}\@@}
+\def\tabu@message@spread{\tabu@spreadheader
+   \expandafter\tabu@msg@align \the\tabu@spreadtarget {}{}{}{}{}\@@
+   \expandafter\tabu@msg@align \the\wd\tabu@box {}{}{}{}{}\@@
+   \expandafter\tabu@msg@align \the\tabucolX {}{}{}{}{}\@@
+   \expandafter\tabu@msg@align \expandafter-\the\tabu@naturalX {}{}{}{}{}\@@}
+\def\tabu@message@reached{\tabu@header
+   \expandafter\tabu@msg@align \the\tabucolX { }{ }{ }{ }{}\@@
+   ******** Reached Target : hfuzz=\tabu@hfuzz\space ********^^J}
+\def\do#1{%
+   \def\tabu@msg@align##1.##2##3##4##5##6##7##8##9\@@{%
+   \ifnum##1<10 #1#1#1\else
+   \ifnum##1<100 #1#1\else
+   \ifnum##1<\@m #1\fi\fi\fi
+   ##1.##2##3##4##5##6##7##8#1}%
+   \def\tabu@header{%
+      \ifnum\tabu@cnt=\@ne (tabu)
+       Try#1#1#1#1tabu X#1#1#1#1#1#1tabu Width#1#1#1#1#1Target%
+                  #1#1#1#1#1#1#1#1#1Coefs#1#1#1#1#1#1#1Update^^J\fi
+       (tabu) \ifnum\tabu@cnt<10 #1\fi\the\tabu@cnt)#1#1}%
+   \def\tabu@spreadheader{%
+      (tabu) Try#1#1#1#1Spread#1#1#1tabu Width#1#1#1#1#1Min Nat.#1#1#1#1Nat.X%
+                                              #1#1#1#1#1#1#1#1#1New Target^^J%
+      (tabu)spread}%
+}\do{ }
+%    \end{macrocode}
+%    \end{macro}
+%
+% \subsubsection(Natural width measure){Measuring the natural width for \textt{tabu spread}}
+%
+%    \begin{macro}{\tabu@spread@startpbox}
+%    \begin{macro}{\tabu@spread@endhbox}
+%
+%    When ``\textt{tabu spread}'' is used with \textt X columns, the first trial must
+%    measure the natural width of the columns. Therefore, the \cs{vbox}, \cs{vtop} or \cs{vcenter}
+%    corresponding to the \textt X columns definitions are temporarily changed into \cs{hbox}. More
+%    precisely, the natural width is measured with \cs{vbox}\M*{\cs{hbox}\M*{...}}.
+%
+%    For the furthur trials, the standard scheme for \textt X column is used.
+%
+%    \begin{macrocode}
+\def\tabu@spread@startpbox#1{\bgroup
+   \in@{\tabucolX}{#1}%
+   \ifin@
+      \let\vss\relax\let\vfil\vss\let\vfill\vss\let\vskip\@tempskipa
+      \hbox to\tabu@target\bgroup\aftergroup\tabu@spread@endhbox\hfil
+   \else
+      \expandafter\@gobble\tabu@startpboxORI{#1}% \@gobble \bgroup
+   \fi
+}% \tabu@spread@startpbox
+\def\tabu@spread@endhbox{%
+   \ifnum\badness>\@M %<text does not fit>
+      \global\tabu@naturalX \tabu@target
+   \else
+      \setbox\tabu@box\lastbox
+      \setbox\tabu@box\hbox{\unhbox\tabu@box}%
+      \global\advance\tabu@X@cols \@ne
+      \ifcsname tabu@X\the\tabu@X@cols\endcsname
+         \global\advance\tabu@naturalX \wd\tabu@box
+      \else
+         \global\tabu@X@cols \@ne
+         \global\tabu@naturalX \wd\tabu@box
+      \fi
+      \ifdim \tabu@naturalX@max<\tabu@naturalX
+         \xdef\tabu@naturalX@max{\the\tabu@naturalX}%
+      \fi
+      \ifdim \tabu@naturalX@min<\dimexpr \wd\tabu@box * \tabu@X@sum /
+                  (65536*\csname tabu@X\the\tabu@X@cols\endcsname)\relax
+         \xdef\tabu@naturalX@min{\the\dimexpr \wd\tabu@box * \tabu@X@sum /
+                     (65536*\csname tabu@X\the\tabu@X@cols\endcsname)\relax}%
+      \fi
+   \fi
+   \box\tabu@box
+   \egroup % end of \vtop (measure)
+}% \tabu@spread@endhbox
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+% \subsection{Numbers in \textt{tabu}}
+%
+% \subsubsection{\cs{tabudecimal}}
+%
+%    \begin{macro}{\tabudecimal}
+%    \begin{macrocode}
+\def\tabu@tabudecimal#1{%
+   \def\tabu@decimal{#1}\@temptokena{}%
+   \let\tabu@getdecimal@ \tabu@getdecimal@ignorespaces
+   \tabu@scandecimal
+}% \tabudecimal
+\def\tabu@scandecimal{\futurelet \tabu@temp \tabu@getdecimal@}
+\def\tabu@skipdecimal#1{#1\tabu@scandecimal}
+\def\tabu@getdecimal@ignorespaces{%
+   \ifcase 0\ifx\tabu@temp\ignorespaces\else
+            \ifx\tabu@temp\@sptoken1\else
+            2\fi\fi\relax
+      \let\tabu@getdecimal@ \tabu@getdecimal
+      \expandafter\tabu@skipdecimal
+   \or \expandafter\tabu@gobblespace\expandafter\tabu@scandecimal
+   \else \expandafter\tabu@skipdecimal
+   \fi
+}% \tabu@getdecimal@ignorespaces
+\def\tabu@get@decimal#1{\@temptokena\expandafter{\the\@temptokena #1}%
+                        \tabu@scandecimal}
+\def\do#1{%
+   \def\tabu@get@decimalspace#1{%
+      \@temptokena\expandafter{\the\@temptokena #1}\tabu@scandecimal}%
+}\do{ }
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@getdecimal}
+%    \begin{macrocode}
+\def\tabu@getdecimal{%
+   \ifcase    0\ifx 0\tabu@temp\else
+               \ifx 1\tabu@temp\else
+               \ifx 2\tabu@temp\else
+               \ifx 3\tabu@temp\else
+               \ifx 4\tabu@temp\else
+               \ifx 5\tabu@temp\else
+               \ifx 6\tabu@temp\else
+               \ifx 7\tabu@temp\else
+               \ifx 8\tabu@temp\else
+               \ifx 9\tabu@temp\else
+               \ifx .\tabu@temp\else
+               \ifx ,\tabu@temp\else
+               \ifx -\tabu@temp\else
+               \ifx +\tabu@temp\else
+               \ifx e\tabu@temp\else
+               \ifx E\tabu@temp\else
+               \ifx\tabu@cellleft\tabu@temp1\else
+               \ifx\ignorespaces\tabu@temp1\else
+               \ifx\@sptoken\tabu@temp2\else
+            3\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\relax
+       \expandafter\tabu@get@decimal
+   \or \expandafter\tabu@skipdecimal
+   \or \expandafter\tabu@get@decimalspace
+   \else\expandafter\tabu@printdecimal
+   \fi
+}% \tabu@getdecimal
+\def\tabu@printdecimal{%
+   \edef\tabu@temp{\the\@temptokena}%
+   \ifx\tabu@temp\@empty\else
+   \ifx\tabu@temp\space\else
+      \expandafter\tabu@decimal\expandafter{\the\@temptokena}%
+   \fi\fi
+}% \tabu@printdecimal
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+% \subsection(Lines inside tabu){Lines inside \textt{tabu}}
+%
+% \subsubsection{Vertical lines}
+%
+%
+%    \begin{macro}{\tabuvline@rewrite}
+%
+%    \textt\textbar\ is defined as a new column type (only inside \textt{tabu}) in order to add an optional argument:
+%    the width of the rule.
+%
+%    \begin{macrocode}
+\newcommand*\tabuvline@rewrite[1][]{\tabuvline@arg{#1}%
+                     \expandafter \NC@find \tabu@temp}
+\def\tabu@vline#1{\vrule width#1}
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabuvline@arg}
+%
+%    A tedious (and fastidious) macro to parse the optional argument of \textt\textbar\ vertical lines...
+
+%    \begin{macrocode}
+\def\tabuvline@arg#1{%
+   \ifx\\#1\\%    <shortcut when no option>
+      \def\tabu@temp{!{\tabu@vline\arrayrulewidth}}%
+   \else \futurelet \tabu@temp \tabuvline@argi #1\p@\p@\@nnil \tabuvline@argiii
+   \fi
+}% \tabuvline@arg
+\def\tabuvline@argi{%
+   \let\tabu@color \@empty
+   \ifcat A\noexpand\tabu@temp
+         \@tempdima\arrayrulewidth
+         \expandafter\tabu@getlinecolor
+   \else \expandafter\tabuvline@argii
+   \fi
+}% \tabuvline@argi
+\def\tabuvline@argii#1\@nnil{%
+   \tabu@maybecolor \@tempdima #1 \@nnil
+}% \tabuvline@argii
+\def\tabuvline@argiii{%
+   \edef\tabu@temp{!{\color@begingroup\tabu@color
+                     \noexpand\tabu@vline{\the\@tempdima}\color@endgroup}}%
+}% \tabuvline@argiii
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@lines}
+%
+%  This macro is used in \cs{tabu@setup} to ``mount'' the character \textt\textbar\ as a column type.
+%
+%    \begin{macrocode}
+{
+\expandafter\let\csname NC@find@|\endcsname\relax
+\expandafter\let\csname NC@rewrite@|\endcsname\relax
+\xdef\tabu@lines{%
+   \let\csname NC@find@|\endcsname \noexpand\tabuvlines@find
+   \let\csname NC@rewrite@|\endcsname \noexpand\tabuvline@rewrite
+}% \tabu@vline
+}
+\def\tabuvlines@find#1|{\NC@{#1}}
+%    \end{macrocode}
+%    \end{macro}
+%
+% \subsubsection{Horizontal lines: \cs{tabucline}}
+%
+%    \begin{macro}{\tabu@firstcline}
+%    \begin{macrocode}
+\def\tabu@firstcline{%
+   \tabu@firstclinetrue
+   \let\tabu@everycr\everycr
+   \def\tabu@restoreeverycr{\let\everycr\tabu@everycr}%
+   \def\everycr{\afterassignment\tabu@restoreeverycr\@temptokena}% <for ialign>
+   \tabu@everycr{\noalign{%
+      \global\tabu@everycr{\noalign{%
+            \global\tabu@everycr{}\global\tabu@firstclinefalse}}%
+      \global\let\everycr\tabu@everycr}}%
+}% \tabu@firstcline
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabucline}
+%
+%     \cs{tabucline}\M[style or spec.]\M*{start-end}
+%
+%     \cs{tabucline} appears only at the end of a line: this is the place where we can insert a \cs{noalign} group.
+%     We built a new line to be inserted inside the \textt{tabu}: this new line which contains the rule or leaders,
+%     is stored into \cs{toks@} (inside the \cs{noalign} group). When leaving the group \cs{toks@} is expanded.
+%
+%    \begin{macrocode}
+\def\tabu@linedash{4pt}%   <default value>
+\def\tabu@dashgap{4pt}%    <default value>
+\def\tabucline{\noalign{\ifnum0=`}\fi\@ifstar
+   {\@tempswatrue\tabu@cline}
+   {\@tempswafalse\tabu@cline}}%
+\newcommand*\tabu@cline[2][]{%
+   \tabu@startstop{#2}\tabu@getlinespec{#1}\@multicnt\@ne
+   \ifnum\tabu@start>\tabu@stop \the\toks@
+   \else\ifx\tabu@xleaders\relax\the\toks@
+   \else
+      \toks@{\ifnum0=`{\fi}\noalign{\global\setbox\tabu@box \box\@arstrutbox}}%
+      \iftabu@firstcline\if\tabu@align t\vskip-\ht\@arstrutbox\fi\fi
+      \@whilenum\@multicnt<\tabu@start\do{\advance\@multicnt\@ne
+                              \toks@\expandafter{\the\toks@ &}}%
+      \loop
+         \toks@\expandafter{\the\toks@ \omit }%
+         \ifcase 0\if@tempswa\else\ifnum \@multicnt>\tabu@start 1\fi\fi\relax
+         \expandafter \tabu@add \csname tabu@tok@\the\@multicnt L\endcsname \@nil
+         \fi
+         \ifcase 0\if@tempswa\else\ifnum \@multicnt<\tabu@stop 1\fi\fi\relax
+            \toks@\expandafter{\the\toks@ \color@begingroup}%
+            \toks@\expandafter\expandafter\expandafter{\expandafter\the
+                              \expandafter\toks@ \tabu@xleaders \color@endgroup}%
+         \fi
+         \ifcase 0\if@tempswa\else\ifnum \@multicnt<\tabu@stop 1\fi\fi %
+         \expandafter \tabu@add \csname tabu@tok@\the\@multicnt R\endcsname \@nil
+         \fi
+         \ifnum\@multicnt<\tabu@stop
+            \advance\@multicnt\@ne
+            \if@tempswa \toks@\expandafter{\the\toks@ &}%
+            \else       \toks@\expandafter{\the\toks@ \span}\fi
+      \repeat
+      \@whilenum\@multicnt<\tabu@nbcols\do{\advance\@multicnt\@ne
+                              \toks@\expandafter{\the\toks@ &}}%
+      \toks@\expandafter{\the\toks@ \cr \noalign{%
+           \global\tabu@firstclinefalse \global\setbox\@arstrutbox \box\tabu@box}}%
+      \the\toks@
+   \fi\fi
+}% \tabucline
+\def\tabu@add #1\@nil{\toks@\expandafter{\the\toks@ #1\ifmmode$\fi}}
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@startstop}
+%
+%    This macro parses the mandatory argument of \cs{tabucline}: start-column and end-column of the \textt{cline}.
+%
+%    \begin{macrocode}
+\def\tabu@startstop#1{\tabu@start@stop #1\relax 1-\tabu@nbcols\@nnil}
+\def\tabu@start@stop #1-#2\@nnil{%
+   \countdef\tabu@start100\countdef\tabu@stop101 % <inside noalign group>
+   \@defaultunits \tabu@start \number0#1\relax\@nnil
+   \@defaultunits \tabu@stop  \number0#2\relax\@nnil
+   \ifnum\tabu@start>\tabu@nbcols\tabu@start=\tabu@nbcols\else
+      \ifnum\tabu@start>\z@\else \tabu@start=\@ne        \fi\fi
+   \ifnum\tabu@stop>\tabu@nbcols \tabu@stop\tabu@nbcols  \else
+      \ifnum\tabu@stop>\z@\else  \tabu@stop=\tabu@nbcols \fi\fi
+}% \tabu@start@stop
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@getlinespec}
+%
+%    This macro parses the optional argument of \cs{tabucline} and check if it's a line specification
+%    (then \cs{tabu@getline} is expanded) or a \cs{leaders} specification (then \cs{tabu@leaders} is expanded).
+%
+%    \begin{macrocode}
+\def\tabu@getlinespec#1{\let\tabu@xleaders \relax
+   \@defaultunits \let\@tempa=#1 \relax\@nnil
+   \ifx\@tempa\relax \let\tabu@xleaders \tabu@defaultleaders\else
+   \ifx\@tempa\hbox  \tabu@defleaders{#1}\else
+   \ifx\@tempa\box   \tabu@defleaders{#1}\else
+   \ifx\@tempa\copy  \tabu@defleaders{#1}\else
+   \ifcsname tabu@line@style@\string#1\endcsname
+      \csname tabu@line@style@\string#1\endcsname
+   \else \tabu@getline{#1\p@ on0pt off0pt}\fi\fi\fi\fi\fi
+}% \tabu@getlinespec
+\def\tabu@defleaders#1{%
+   \def\tabu@xleaders{\xleaders\hbox{\lower.5\extrarowheight#1}\tabu@leaderfill}}
+\def\tabucline@warn#1{\PackageWarning{tabu}
+   {Undefined line syle: #1
+   \MessageBreak Using default line style instead}%
+   \let\tabu@xleaders \tabu@defaultleaders
+}% \tabucline@warn
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@getline}
+%
+%     This macro parses the optional argument of \cs{tabucline} (or the one of \cs{tabulinestyle})
+%     and extract the thickness, the dash an gap specified. Default values assignments are done either.
+%
+%    \begin{macrocode}
+\def\tabu@getline#1{\tabu@lineon #1 \@nil on\tabu@linedash \p@ \@nil\@nnil{#1}}
+\def\tabu@maybecolor{\ifx\tabu@color\@empty \afterassignment\tabu@colortest
+                     \else \@defaultunits\fi}
+\def\tabu@lineon #1on#2\@nil#3\@nnil#4{%
+   \let\tabu@color \@empty
+   \@defaultunits \let\@tempa=#1 \relax\@nnil
+   \ifcase 0\ifx o\@tempa 1\else\ifcat A\noexpand\@tempa 2\fi\fi\relax
+      \tabu@maybecolor \@tempdima #1\arrayrulewidth \p@\@nnil
+      \tabu@maybecolor \@tempdimb #2\p@ \@nnil
+      \tabu@lineoff #1 on#2 off\tabu@dashgap \p@ \@nnil
+   \or\@tempdima \arrayrulewidth
+      \tabu@maybecolor \@tempdimb #2\p@ \@nnil
+      \tabu@lineoff #1 on#2 off\tabu@dashgap \p@ \@nnil
+   \else
+      \tabu@maybecolor \@tempdima \arrayrulewidth #1\p@\@nnil
+      \ifx\tabu@color\@empty \tabucline@warn{#4}\else
+      \@tempdimb \z@
+      \tabu@lineoff off0pt \p@\@nnil \fi
+   \fi
+}% \tabu@lineon
+\def\tabu@lineoff #1off#2\@nnil{%
+   \tabu@maybecolor \@tempdimc #2\p@ \@nnil
+   \ifdim \@tempdimb=\z@
+      \ifdim \@tempdimc>\z@ \@tempdimb \tabu@dashgap\relax\fi\fi
+   \ifdim \@tempdimc=\z@
+      \ifdim \@tempdimb>\z@ \@tempdimc \tabu@linedash\relax\fi\fi
+   \ifdim \@tempdima<\z@ \else
+   \ifdim \@tempdimb<\z@ \else
+   \ifdim \@tempdimc<\z@ \else
+      \edef \tabu@xleaders{\tabu@color\xleaders
+         \ifdim\@tempdimc>\z@
+            \hbox\bgroup \kern\the\dimexpr\@tempdimc/2\relax\fi
+         \noexpand\iftabu@firstcline
+         \vrule depth\the\@tempdima
+                \ifdim\@tempdimb>\z@ width\the\@tempdimb\fi
+         \noexpand\else
+         \vrule height\dimexpr-\extrarowheight+\the\@tempdima
+                depth\extrarowheight
+               \ifdim\@tempdimb>\z@ width\the\@tempdimb\fi
+         \noexpand\fi
+         \ifdim\@tempdimc>\z@
+            \kern\the\dimexpr\@tempdimc/2\egroup\fi
+         \tabu@leaderfill}%
+   \fi\fi\fi
+}% \tabu@lineoff
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@colortest}
+%
+%
+%
+%    \begin{macrocode}
+\def\tabu@colortest{\futurelet\tabu@temp\tabu@linecolor}
+\def\tabu@linecolor{%
+   \ifcase 0\if ,\noexpand\tabu@temp\else
+            \ifx\relax\tabu@temp\else
+            \ifx \@sptoken\tabu@temp1\else
+            \ifcat A\noexpand\tabu@temp2\else
+            3\fi\fi\fi\fi\relax
+   \def\tabu@next##1{\futurelet\tabu@temp\tabu@linecolor}%
+   \or\def\tabu@next{\tabu@gobblespace{\futurelet\tabu@temp\tabu@linecolor}}%
+   \or\let\tabu@next\tabu@getlinecolor
+   \else\expandafter\remove@to@nnil
+   \fi \tabu@next
+}% \tabu@linecolor
+\def\tabu@getlinecolor#1\p@{%
+   \edef\@tempa{\zap@space #1 \@empty}%
+   \ifcsname\string\color@\@tempa\endcsname
+      \edef\tabu@color{\noexpand\noexpand\noexpand\color{\@tempa}}%  \set@color
+   \fi\remove@to@nnil
+}% \tabu@getlinecolor
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabulinestyle}
+%
+%   \cs{tabulinestyle}\M*{style=spec.}
+%
+%    \begin{macrocode}
+\def\tabulinestyle#1{\@for\@tempa:=#1\do{\expandafter\tabu@linestyle\@tempa==\@nil}}
+\def\tabu@linestyle#1=#2=#3\@nil{%
+   \begingroup \tabu@getlinespec {#2}\expandafter\gdef
+         \csname tabu@line@style@\string#1\expandafter\endcsname
+                     \expandafter{\expandafter\def\expandafter\tabu@xleaders
+                                                \expandafter{\tabu@xleaders}}%
+   \endgroup
+}% \tabu@linestyle
+\expandafter\def \csname tabu@line@style@\endcsname {%
+                                     \let\tabu@xleaders \tabu@defaultleaders}%
+\def\tabu@defaultleaders{\leaders
+   \iftabu@firstcline
+      \vrule  depth \arrayrulewidth
+   \else
+      \vrule  height\dimexpr-\extrarowheight+\arrayrulewidth
+              depth \extrarowheight
+   \fi
+   \tabu@leaderfill}
+\let\tabu@leaderfill \hfil
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+% \subsection(Verbatim with X columns){Verbatim inside \textt{tabu} with \textt X columns}
+%
+%    \begin{macro}{\tabu@sanitizetext}
+%    \begin{macrocode}
+{\catcode32=13\relax\catcode`\^^@=13\relax
+\gdef\tabu@verb{\@sanitize\makeatletter\catcode`\^=7\edef\^{\string^}%
+\catcode32=13\let =\ \catcode`\^^@=13\def^^@{\par}\endlinechar\m@ne}%
+}
+\newcommand\tabu@sanitizetext[1][\ttfamily]{\begingroup
+                        \tabu@verb #1\tabu@s@nitizetext}
+\long\def\tabu@s@nitizetext#1{\@makeother\{\@makeother\}%
+            \everyeof{\noexpand}\scantokens{#1}\endgroup}
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+% \subsection{\cs{savetabu}}
+%
+%    \begin{macro}{\savetabu}
+%
+%    When this command is called by the user, the \textt{tabu} preamble and target are globally
+%    stored into a macro \cs{tabu@saved@\meta{user-name}}.
+%
+%    \begin{macro}{\tabu@saveX}
+%
+%    \cs{tabu@saveX} replaces \cs{savetabu} inside a \textt{tabu} with \textt X columns.
+%    The \textt X columns widths have to be stored, that is, the value in points of \cs{tabucolX}.
+%
+%    \begin{macrocode}
+\newcommand*\savetabu[1]{\noalign{%
+   \ifx\\#1\\\tabu@savewarn{}{The tabu will not be saved}\else
+      \@ifundefined{tabu@save@\string#1}{}{\tabu@savewarn{#1}{Overwritting}}%
+      {\toks@\expandafter{\tabu@saved}%
+      \expandafter\xdef\csname tabu@saved@\string#1\endcsname{%
+         \tabu@target\the\tabu@target\relax
+         \the\toks@}}%
+   \fi}%
+}% \savetabu
+%    \end{macrocode}%
+%
+%    \begin{macrocode}
+\def\tabu@saveX#1{\noalign{%
+   \ifx\\#1\\\tabu@savewarn{}{The tabu will not be saved}\else
+      \@ifundefined{tabu@saved@\string#1}{}{\tabu@savewarn{#1}{Overwritting}}%
+      {\toks@\expandafter{\tabu@saved}%
+      \expandafter\xdef\csname tabu@saved@\string#1\endcsname{%
+         \tabucolX\the\tabucolX\relax
+         \tabu@target\the\tabu@target\relax
+         \the\toks@}}%
+   \fi}%
+}% \tabu@saveX
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@savewarn}
+%    \begin{macro}{\tabu@saveerr}
+%
+%    Info for overwritting when \cs{savetabu} is used.
+%
+%    Error if \cs{usetabu} is called with an unknown argument.
+%
+%    \begin{macrocode}
+\def\tabu@savewarn#1#2{\PackageInfo{tabu}
+   {User-name `#1' already used for \string\savetabu
+   \MessageBreak #2}}%
+\def\tabu@saveerr#1{\PackageError{tabu}
+   {User-name `#1' is unknown for \string\usetabu
+   \MessageBreak I cannot restore an unknown preamble!}\@ehd}
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%
+%
+% \subsection(\cs{rowfont}){\csbf{rowfont}}
+%
+% \subsubsection(Font and alignment){Setting font and alignment specification}
+%
+%    \begin{macro}{\rowfont}
+%
+%    \cs{rowfont} uses the control sequences \cs{tabu@celllalign}, \cs{tabu@cellleft}, \cs{tabu@cellright}\linebreak
+%    and \cs{tabu@cellralign} which have been placed on purpose into the user-defined tokens inserted
+%    in any preamble by the \xpackage{array} package.
+%
+%    \cs{tabu@celllalign} and \cs{tabu@cellralign} are used to modify the alignment. If the optional
+%    \M[alignment] parameter of \cs{rowfont} is not specified, then those control sequence expand
+%    to \cs{@empty}.
+%
+%    \cs{tabu@cellleft} contains the font-modification information.
+%
+%    Placement of those control sequences into the user-tokens that are inserted in the preamble
+%    by the \xpackage{array} package is explained below under the macro \cs{tabu@prepnext@tok}.
+%
+%    \begin{macrocode}
+\def\tabu@rowfont{\noalign{\ifnum0=`}\fi\tabu@row@font}
+\newcommand*\tabu@row@font[2][]{%
+   \global\tabu@everycr@tok=\everycr
+   \global\let\tabu@@cellleft \tabu@cellleft
+   \global\let\tabu@@cellright \tabu@cellright
+   \gdef\tabu@cellfont{#2}%
+   \ifcsname tabu@cell@#1\endcsname  % row alignment
+         \csname tabu@cell@#1\endcsname \fi
+   \toks@\expandafter {\tabu@cellleft\tabu@cellfont}% inside \noalign group ok
+   \xdef\tabu@cellleft {\the\toks@}%
+   \global\everycr\expandafter {\the\everycr\tabu@rowfont@reset}%
+   \ifnum0=`{\fi}% end of noalign group
+}% \rowfont
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%    \begin{macro}{\tabu@rowfont@reset}
+%
+%    This macro resets \cs{tabu@celllalign},\, \cs{tabu@cellleft},\, \cs{tabu@cellright},\, \cs{tabu@cellralign}\, and\,
+%    \cs{everycr} to the value they had before the expansion of \cs{rowfont}.
+%
+%    It expands when a new row is inserted into the tabular or array.
+%
+%    \begin{macrocode}
+\def\tabu@rowfont@reset{%
+   \noalign{%
+      \global\let\tabu@cellleft \tabu@@cellleft
+      \global\let\tabu@cellright \tabu@@cellright
+      \global\let\tabu@cellfont \@empty
+      \global\let\tabu@celllalign \@empty
+      \global\let\tabu@cellralign \@empty
+      \global\everycr=\tabu@everycr@tok
+      \global\tabu@everycr@tok{}%
+   }%
+}% \tabu@rowfont@reset
+%    \end{macrocode}
+%    \end{macro}
+%
+% \subsubsection(Tokens preparation){Preparing stuff to be able to use \cs{rowfont}}
+%
+%    \begin{macro}{\tabu@prepnext@tok}
+%
+%    \cs{tabu@prepnext@tok} will replace \cs{prepnext@tok} (in \xfile{array.sty}): its purpose is to add
+%    the control sequences \cs{tabu@celllalign},\, \cs{tabu@cellleft},\, \cs{tabu@cellright}\, and\, \cs{tabu@cellralign}\,
+%    at the right position in the ``preamble'' for \cs{halign}. Those control sequences are not inserted directly
+%    into the preamble, but by the means of the user-tokens placed there by the \xpackage{array} package.
+%
+%     The package \xpackage{array} defines a macro \cs{prenext@tok} to initialize each user-token
+%     inserted at both side of each ``normal'' column. For ``special`' \textttbf @ and \texttbf ! columns,
+%     there is only one token.
+%     \begin{center}
+%     \begin{tikzpicture}
+%     \node (L) at (1,1)  {$\underbrace{\hbox{>\M*{\cs{bfseries}\cs{color}\M*{red}}}}$}
+%           node [anchor=west] (r) at (L.east) {\raise.5ex\hbox{\larger r}}
+%           node [anchor=west] (R) at (r.east) {$\underbrace{\hbox{<\M*{\cs{color}\M*{black}\cs ,\cs\$}}}$}
+%           node [anchor=center] at (L.south) {\cs{toks}<$i$>}
+%           node [anchor=center] at (R.south) {\cs{toks}<$i+1$>};
+%     \end{tikzpicture}
+%     \end{center}
+%
+%     When a column is inserted in the tabular preamble (\cs{@preamble}), the \TeX{} counter \cs{count@}
+%     is equal to $i+1$ (\ie the right token) and the counter \cs{@tempcnta} is equal to $i$ (\ie the left token).
+%     If the column is special (\ie \texttbf @ or \texttbf !) \cs{@tempcnta} is not updated.
+%
+%     Thus, when a new token is ``prepared'' by \cs{prepnext@tok}:
+%     \begin{description}[leftmargin=1cm]
+%     \item[either: $\mathbf{i=}$\cs{count@}$\,=$\cs{@tempcnta}]: the token to prepare (\ie \cs{toks}$<i+1>$)
+%           is the right one of a ``normal'' column. The switch \cs{iftabu@cellright} is set to \textt{true}. \\
+%           The \emph{previous} token (\cs{toks}$<i>=$\cs{toks}\cs{count@}) is necessarily the left one of this ``normal'' column:
+%           we prepend \cs{tabu@celllalign} and append \cs{tabu@cellleft} to this token (\cs{toks}$<i>$).
+%           This token is finished and will not change afterwards.
+%
+%     \item[or: $\mathbf{i=}$\cs{count@}$\,=$\cs{@tempcnta}$+1$]: the token to prepare (\cs{toks}$<i+1>$) is either the left one of a normal column,
+%           or the single one of a special\, \texttbf @ or \texttbf !\, column.\\
+%           If the switch \cs{iftabu@cellright} is true, then the \emph{previous} token \cs{toks}$<i>$ is the right one of the last inserted column
+%           (which was a ``normal'' column, thus):, \cs{tabu@cellright}\cs{tabu@cellralign}\, is appended to it, and the switch
+%           \cs{ittabu@cellright} is reset to \texttt{false}.
+%           May be \cs{prepnext@tok} will be expanded again (by \cs{save@decl}): if it happens,
+%           then again\, \cs{count@}$\,=$\cs{@tempcnta}$+1$\, (same case) but \cs{iftabu@cellright} is \textt{false} and nothing is changed.
+%
+%     \item[else:] The token to prepare (which is \cs{toks}$<i+1>=$\cs{toks}\cs{count@}$+1$), cannot be the right one of a ``normal'' column:
+%           \cs{iftabu@cellright} is set to \textt{false}. \\
+%           The fact that\, $\vert$\cs{count@}$-$\cs{@tempcnta}$\vert>1$\, tells us that the previous token \cs{toks}$<i>$
+%           is necessarily the single one of a ``special''\, \texttbf @ or \texttbf !\, column. We don't modify this token, as
+%           long as \emph{special columns are always inserted as is}:\, \cs{rowcolor} has no effect on special
+%           columns, nor\, \cs{rowfont}.
+%     \end{description}
+%     Thereafter, the original initialisation sequence occurs: \cs{advance}\cs{count@}\textt{ by}\cs{@ne} and initialize the token
+%     to prepare (\cs{toks}\cs{count@}$\,=$\cs{toks}$<i+1>$) to an empty one.
+%
+%    \begin{macrocode}
+\newif\iftabu@cellright
+\AtBeginDocument{\let\array@prepnext@tok \prepnext@tok }% original definition
+\def\tabu@prepnext@tok{%
+   \ifnum \count@<\z@  % <first initialisation>
+      \@tempcnta \@M   % <not initialized by array.sty>
+      \tabu@nbcols\z@
+      \gdef\tabu@global@temp{\tabu@nbcols\z@}%
+      \expandafter\let\csname tabu@tok@1L\endcsname \relax
+      \tabu@cellrightfalse
+   \else
+      \ifcase \numexpr \count@-\@tempcnta \relax % (case 0): prev. token is left
+         \advance \tabu@nbcols\@ne
+         \ifnum \tabu@nbcols>\@ne
+         \expandafter\let\csname tabu@tok@\the\tabu@nbcols L\endcsname \relax
+         \fi
+         \expandafter\let\csname tabu@tok@\the\tabu@nbcols R\endcsname \relax
+         \expandafter\gdef\expandafter\tabu@global@temp\expandafter{%
+                           \tabu@global@temp \advance\tabu@nbcols\@ne}%
+         \iftabu@cellright % before-previous token is right and is finished
+            \tabu@cellrightfalse % <only once>
+            \tabu@savetok R\tabu@preptokenright
+         \fi
+         \tabu@savetok L\tabu@preptokenleft
+      \or                     % (case 1) previous token is right
+         \tabu@savetok R\tabu@cellrighttrue
+      \else % special column: do not change the token
+         \ifnum \tabu@nbcols>\z@ %special column: always on the right of normal one
+         \else % unless this is the very first column (\tabu@nbcols=0)
+            \advance\tabu@nbcols\@ne \tabu@savetok L\advance\tabu@nbcols\m@ne
+         \fi
+         \iftabu@cellright    % before-previous token is right
+            \tabu@cellrightfalse
+            \tabu@savetok R\tabu@preptokenright
+         \fi
+      \fi % \ifcase
+   \fi
+   \array@prepnext@tok
+}% \tabu@prepnext@tok
+\def\tabu@preptokenright{%
+   \advance \count@ \m@ne
+   \toks\count@\expandafter {\the\toks\count@ \tabu@cellright \tabu@cellralign}%
+   \advance \count@ \@ne
+}% \tabu@preptokenright
+\def\tabu@preptokenleft{\toks\count@\expandafter {\expandafter\tabu@celllalign
+                                             \the\toks\count@ \tabu@cellleft}%
+}% \tabu@preptokenleft
+\def\tabu@savetok#1{\begingroup
+   \expandafter\tabu@savet@k\csname tabu@tok@\the\tabu@nbcols #1\endcsname
+}% \tabu@savetok
+\def\tabu@savet@k#1{%
+   \@temptokena\toks\count@
+   \ifx#1\relax\else \@temptokena\expandafter\expandafter
+                     \expandafter{\expandafter#1\the\@temptokena}%
+   \fi
+   \@temptokena\expandafter{\expandafter\def\expandafter#1\expandafter{%
+                                                      \the\@temptokena}}%
+   \toks@\expandafter\expandafter\expandafter{\expandafter\tabu@global@temp
+                                                      \the\@temptokena}%
+   \xdef\tabu@global@temp{\the\toks@}%
+   \expandafter\endgroup \the\@temptokena
+}% \tabu@savetok
+%    \end{macrocode}
+%    \end{macro}
+%
+% \subsubsection(Glue neutralisation){Neutralisation of glues and alignment modification}
+%
+%    \begin{macro}{\tabu@cellleft}
+%    \begin{macro}{\tabu@celllalign}
+%    \begin{macro}{\tabu@cellright}
+%    \begin{macro}{\tabu@cellralign}
+%    \begin{macro}{\tabu@cellfont}
+%    First initialisation to \cs{@empty}.
+%    \begin{macrocode}
+\let\tabu@cellleft\@empty
+\let\tabu@cellright\@empty
+\def\tabu@celllalign{\tabu@cellleft}% row font spec. applies to pre-column material
+\let\tabu@cellralign\@empty
+\let\tabu@cellfont\@empty
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@cell@l}
+%    \begin{macro}{\tabu@cell@c}
+%    \begin{macro}{\tabu@cell@r}
+%    \begin{macro}{\tabu@cell@j}
+%
+%    Setup macros to modify the alignment. The skips inserted to make the standard alignment
+%    specified in the \textt{tabular} preamble are not the same with standard \xpackage{array} tabulars
+%    and \xpackage{colortbl} tabulars, hence the switch \cs{iftabu@colortbl}.
+%
+%    \begin{macrocode}
+\def\tabu@cell@l{% force alignment to left
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \raggedright\arraybackslash
+                        \tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@flush1\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\raggedright\arraybackslash}% local
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@l
+\def\tabu@cell@c{% force alignment to center
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \centering\arraybackslash
+                        \tabu@flush{.5}\tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@flush{.5}\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\centering\arraybackslash}% local
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@c
+\def\tabu@cell@r{% force alignment to right
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \raggedleft\arraybackslash
+                        \tabu@flush1\tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\raggedleft\arraybackslash}% local
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@r
+\def\tabu@cell@j{% force justification (for p, m, b columns)
+   \gdef\tabu@celllalign{\tabu@justify\tabu@cellleft}%
+   \global\let\tabu@cellralign\@empty
+   \toks@\expandafter{\tabu@cellleft\tabu@justify}% local (noalign grp)
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@j
+\def\tabu@justify{%
+   \leftskip\z@skip \@rightskip\leftskip \rightskip\@rightskip
+   \parfillskip\@flushglue
+}% \tabu@justify
+%% ragged2e settings
+\def\tabu@cell@L{% force alignment to left (ragged2e)
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \RaggedRight\arraybackslash
+                        \tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@flush1\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\RaggedRight\arraybackslash}%
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@L
+\def\tabu@cell@C{% force alignment to center (ragged2e)
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \Centering\arraybackslash
+                        \tabu@flush{.5}\tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@flush{.5}\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\Centering\arraybackslash}%
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@C
+\def\tabu@cell@R{% force alignment to right (ragged2e)
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \RaggedLeft\arraybackslash
+                        \tabu@flush1\tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\RaggedLeft\arraybackslash}%
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@R
+\def\tabu@cell@J{% force justification (ragged2e)
+   \gdef\tabu@celllallign{\justifying\arraybackslash\tabu@cellleft}%
+   \global\let\tabu@cellralign\@empty
+   \toks@\expandafter{\tabu@cellleft\justifying\arraybackslash}%
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@J
+\def\tabu@flush#1{%
+   \iftabu@colortbl      % colortbl uses \hfill rather than \hfil
+      \hskip \ifnum\currentgrouptype>13 \stretch{#1}%
+      \else\ifdim#1pt<1pt \tabu@cellskip
+      \else \stretch{#1}
+      \fi\fi \relax
+   \else                % array.sty
+      \ifnum \currentgrouptype>13\relax
+         \hfil \hskip1sp
+      \fi
+   \fi
+}% \tabu@flush
+\AtBeginDocument{%
+   \@ifpackageloaded{ragged2e}
+      {}
+      {\let\tabu@cell@L \tabu@cell@l
+       \let\tabu@cell@R \tabu@cell@r
+       \let\tabu@cell@C \tabu@cell@c
+       \let\tabu@cell@J \tabu@cell@j
+      }%
+}% AtBeginDocument
+%    \end{macrocode}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@removehfil}
+%
+%    \cs{tabu@removehfil} removes (eventually) the infinite stretchable glue inserted
+%    \emph{before} the cell (in the preamble of \cs{halign}) to make the column alignment.
+%
+%    \begin{macrocode}
+\newskip\tabu@cellskip
+\let\tabu@hfil\hfil
+\let\tabu@hfill\hfill
+\let\tabu@hskip\hskip
+\def\tabu@removehfil{%
+   \iftabu@colortbl
+      \unkern \tabu@cellskip = \lastskip
+      \ifnum\gluestretchorder\tabu@cellskip = \tw@ \hskip-\tabu@cellskip
+      \else \tabu@cellskip = \z@skip
+      \fi
+   \else
+      \ifdim\lastskip=1sp\unskip\fi
+      \ifnum\gluestretchorder\lastskip = \@ne
+         \hfilneg % \hfilneg for array.sty but not for colortbl...
+      \fi
+   \fi
+}% \tabu@removehfil
+%    \end{macrocode}
+%    \end{macro}
+%
+%    \begin{macro}{\tabu@ignorehfil}
+%
+%    \cs{tabu@ignorehfil} removes (eventually) the infinite stretchable glue inserted
+%    \emph{after} the cell (in the preamble of \cs{halign}) to make the column alignment.
+%
+%    \begin{macrocode}
+\def\tabu@ignorehfil{%
+   \aftergroup\tabu@nohfil
+}% \tabu@ignorehfil
+\def\tabu@nohfil{% \hfil -> do nothing + restore original \hfil
+   \def\hfil{\let\hfil\tabu@hfil}%   local to (alignment template) group
+}% \tabu@nohfil
+\AtBeginDocument{%
+   \@ifpackageloaded{colortbl}
+   {%
+   \def\tabu@nohfil{%
+      \def\hfil{\let\hfil\tabu@hfil}% local to (alignment template) group
+      \def\hfill{\let\hfill\tabu@hfill}% (colortbl uses \hfill) pfff...
+      \def\hskip##1\relax{\let\hskip\tabu@hskip}}% local
+   }% @ifpackageloaded colortbl
+   {}%
+}% AtBeginDocument
+%    \end{macrocode}
+%    \end{macro}
+%
+%
+%
+% \subsection{Utilities}
+%
+% \subsubsection{tabu \cs{fbox}}
+%
+% \cs{tabu@fbox} works exactly like \LaTeX{} \cs{fbox} but allows the syntax: \cs{fbox}\cs{bgroup}...\cs{egroup}
+% suitable for use inside tabular columns. \cs{fbox} is \cs{let} to \cs{tabu@fbox} at the entry inside a \textt{tabu}
+% environment.
+%
+%    \begin{macrocode}
+\def\tabu@fbox{%
+   \leavevmode
+   \let\color@bgroup\bgroup
+   \def\color@egroup{\endgraf\egroup}%
+   \afterassignment\tabu@begin@fbox
+      \setbox\@tempboxa \hbox
+}% \tabu@fbox
+\def\tabu@begin@fbox{\color@bgroup\kern\fboxsep\aftergroup\tabu@end@fbox}
+\def\tabu@end@fbox{\kern\fboxsep\color@egroup\@frameb@x\relax}
+%    \end{macrocode}
+%
+%
+% \subsubsection{\cs{centering}, \cs{raggedright}, \cs{raggedleft}}
+%
+% Inside \textt{tabu} environment, no need to add \cs{arraybackslash} after these commands.
+%
+%    \begin{macrocode}
+\expandafter\def\expandafter\tabu@centering\expandafter{%
+                                                \centering\arraybackslash}
+\expandafter\def\expandafter\tabu@raggedleft\expandafter{%
+                                                \raggedleft\arraybackslash}
+\expandafter\def\expandafter\tabu@raggedright\expandafter{%
+                                                \raggedright\arraybackslash}
+\AtBeginDocument{%
+\expandafter\def\expandafter\tabu@trivlist\expandafter{%
+   \expandafter\let\expandafter\\\expandafter\@centercr\@trivlist}%
+}%
+%    \end{macrocode}
+%
+%
+%
+%
+% \subsection{Corrections}
+%
+% \subsubsection(delarray compatibility fix){delarray comptability fix for \xpackage{colortbl} and \xpackage{arydshln}}
+%
+% Both \xpackage{colortbl} and \xpackage{arydshln} forgot the control sequence \cs{@arrayright}
+% which must be expanded by \cs{endarray}. Originally defined for \xpackage{delarray}, this control
+% sequence is used by \textt{tabu} environments when \textt{tabu X} columns are present in the preamble.
+%
+% Here is the fix. We test if \cs{endarray} contains \cs{@arrayright} before modifying the control sequence,
+% in case \xpackage{colortbl} and/or \xpackage{arydshln} modify their implementation.
+%
+%    \begin{macrocode}
+\def\tabu@fix@arrayright{%
+   \@ifpackageloaded{arydshln}
+   {%
+   \@ifpackageloaded{colortbl}
+      {%% colortbl + arydshln
+      \def\tabu@endarray{%
+         \adl@endarray \egroup \adl@arrayrestore \CT@end \egroup %<original>
+         \@arrayright     % <FC>
+         \gdef\@preamble{}% <FC>
+                  }}% \endarray
+      {%% arydshln / no colortbl
+      \def\tabu@endarray{%
+         \adl@endarray \egroup \adl@arrayrestore \egroup %<original>
+         \@arrayright     % <FC>
+         \gdef\@preamble{}% <FC>
+                  }}% \endarray
+   }%
+   {%
+   \@ifpackageloaded{colortbl}
+      {%% colortbl / no arydshln
+      \def\tabu@endarray{%
+         \crcr \egroup \egroup
+         \@arrayright  % <FC>
+         \gdef\@preamble{}\CT@end
+                  }}%
+      {\PackageWarning{tabu}
+         {\string\@arrayright\space is missing from the
+         \MessageBreak definition of \string\endarray.
+         \MessageBreak Comptability with delarray.sty is broken.}}%
+   }%
+}% \tabu@fix@arrayright
+%    \end{macrocode}
+%
+% \subsubsection{arydshln @ columns}
+%
+%    \begin{macrocode}
+\def\tabu@adl@xarraydashrule#1#2#3{%
+     \ifnum\@lastchclass=\adl@class@start\else
+     \ifnum\@lastchclass=\@ne\else
+     \ifnum\@lastchclass=5 \else % <FC> @-arg (class 5) and !-arg (class 1)
+             \adl@leftrulefalse \fi\fi           % must be treated the same
+     \fi
+     \ifadl@zwvrule\else \ifadl@inactive\else
+             \@addtopreamble{\vrule\@width\arrayrulewidth
+                     \@height\z@ \@depth\z@}\fi \fi
+     \ifadl@leftrule
+             \@addtopreamble{\adl@vlineL{\CT@arc@}{\adl@dashgapcolor}%
+                     {\number#1}#3}%
+     \else   \@addtopreamble{\adl@vlineR{\CT@arc@}{\adl@dashgapcolor}%
+                     {\number#2}#3}
+     \fi
+}% \tabu@adl@xarraydashrule
+%    \end{macrocode}
+%
+% \subsubsection{arydshln and empty \textt p columns}
+%
+% \xpackage{arydshln} redefines \cs{@endpbox} for \textt p columns. The definition is stored in \cs{adl@act@endpbox}.
+% Here it is:
+%
+% \begin{Verb*}
+%  \unskip \ifhmode \nobreak
+%        \vrule\@width\z@\@height\z@\@depth\dp\@arstrutbox
+%        \fi
+%  \egroup \adl@colhtdp \box\adl@box \hfil
+% \end{Verb*}
+%
+% The \cs{vrule} inserted is exactly what package \xpackage{array} calls: \cs{@finalstrut}\cs{@arstrutbox}.
+%
+% However, just like in \xfile{array.sty}, this array-\textt{strut} should be inserted inconditionnally,
+% and \cs{ifhmode} applies only to \cs{nobreak} (misplaced \cs{fi} in \xpackage{arydshln} definition).
+%
+%
+%    \begin{macrocode}
+\def\tabu@adl@act@endpbox{%
+   \unskip \ifhmode \nobreak \fi    \@finalstrut \@arstrutbox
+   \egroup
+   \adl@colhtdp \box\adl@box \hfil
+}% \tabu@adl@act@endpbox
+%    \end{macrocode}
+%
+%
+
+%
+%
+%    \begin{macrocode}
+%</package>
+%    \end{macrocode}
+%
+% \restoregeometry
+% \bookmarksetup{bold*}
+%
+% \begin{History}
+%
+%
+%   \begin{Version}{2010/10/28 v1.0}
+%   \item First version.
+%   \end{Version}
+%
+% \end{History}
+%
+%
+% \PrintIndex
+%
+% \Finale
\ No newline at end of file
diff --git a/Master/texmf-dist/source/latex/tabu/tabu.ins b/Master/texmf-dist/source/latex/tabu/tabu.ins
new file mode 100644
index 00000000000..73047d8b35b
--- /dev/null
+++ b/Master/texmf-dist/source/latex/tabu/tabu.ins
@@ -0,0 +1,87 @@
+%%
+%% This is file `tabu.ins',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% tabu.dtx  (with options: `install')
+%% 
+%% This is a generated file.
+%% 
+%% tabu : 2010/10/27 v1.1 - tabu : Flexible LaTeX tabulars
+%% 
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either
+%% version 1.3 of this license or (at your option) any later
+%% version. The latest version of this license is in
+%%    http://www.latex-project.org/lppl.txt
+%% 
+%% This work consists of the main source file tabu.dtx
+%% and the derived files
+%%    tabu.sty, tabu.pdf, tabu.ins
+%% 
+%% tabu : Flexible LaTeX tabulars
+%% Copyright (C) 2010 by Florent Chervet <florent.chervet@free.fr>
+%% 
+\input docstrip.tex
+\Msg{************************************************************************}
+\Msg{* Installation}
+\Msg{* Package: 2010/10/27 v1.1 - tabu: Flexible LaTeX tabulars}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+This is a generated file.
+
+tabu : 2010/10/27 v1.1 - tabu : Flexible LaTeX tabulars
+
+This work may be distributed and/or modified under the
+conditions of the LaTeX Project Public License, either
+version 1.3 of this license or (at your option) any later
+version. The latest version of this license is in
+   http://www.latex-project.org/lppl.txt
+
+This work consists of the main source file tabu.dtx
+and the derived files
+   tabu.sty, tabu.pdf, tabu.ins
+
+tabu : Flexible LaTeX tabulars
+Copyright (C) 2010 by Florent Chervet <florent.chervet@free.fr>
+
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+
+\generate{%
+   \file{tabu.ins}{\from{tabu.dtx}{install}}%
+   \file{tabu.sty}{\from{tabu.dtx}{package}}%
+}
+
+\askforoverwritefalse
+\generate{%
+   \file{tabu.drv}{\from{tabu.dtx}{driver}}%
+}
+
+\obeyspaces
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{*     tabu.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `tabu.dtx'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+
+\endinput
+%%
+%% End of file `tabu.ins'.
diff --git a/Master/texmf-dist/tex/latex/tabu/tabu.sty b/Master/texmf-dist/tex/latex/tabu/tabu.sty
new file mode 100644
index 00000000000..750a4286675
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/tabu/tabu.sty
@@ -0,0 +1,1147 @@
+%%
+%% This is file `tabu.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% tabu.dtx  (with options: `package')
+%% 
+%% This is a generated file.
+%% 
+%% tabu : 2010/10/27 v1.1 - tabu : Flexible LaTeX tabulars
+%% 
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either
+%% version 1.3 of this license or (at your option) any later
+%% version. The latest version of this license is in
+%%    http://www.latex-project.org/lppl.txt
+%% 
+%% This work consists of the main source file tabu.dtx
+%% and the derived files
+%%    tabu.sty, tabu.pdf, tabu.ins
+%% 
+%% tabu : Flexible LaTeX tabulars
+%% Copyright (C) 2010 by Florent Chervet <florent.chervet@free.fr>
+%% 
+
+\NeedsTeXFormat{LaTeX2e}[2005/12/01]
+\ProvidesPackage{tabu}[2010/10/28 v1.1 - flexible LaTeX tabulars (FC)]
+\RequirePackage{array}[2008/09/09]
+\AtEndOfPackage{\tabu@AtEnd\let\tabu@AtEnd\@undefined}
+\let\tabu@AtEnd\@empty
+\def\TMP@EnsureCode#1#2{%
+  \edef\tabu@AtEnd{%
+    \tabu@AtEnd
+    \catcode#1 \the\catcode#1\relax
+  }%
+  \catcode#1 #2\relax
+}% \TMP@EnsureCode
+\TMP@EnsureCode{33}{12} % !
+\TMP@EnsureCode{124}{12}% |
+\TMP@EnsureCode{0}{12}%  ^^@
+\TMP@EnsureCode{36}{3}% $ = math shift
+\let\tabu@message\@gobble
+\def\tracingtabu{\let\tabu@message\message}
+\let\tabudefaulttarget\linewidth
+\DeclareOption{debugshow}{\tracingtabu}
+\DeclareOption{linegoal}{%
+   \AtEndOfPackage{\RequirePackage{linegoal}[2010/10/31]}%
+   \def\tabudefaulttarget{\linegoal}% \linegoal is \linewidth if not pdfTeX
+}% linegoal option
+\DeclareOption{delarray}{%
+   \AtEndOfPackage{\RequirePackage{delarray}}%
+}% delarray option
+\DeclareOption{light}{%
+   \AtEndOfPackage{%
+      \let\tabu@prepnext@tok \prepnext@tok
+      \let\tabu@save@decl \save@decl
+      \let\tabu@rowfont \tabu@norowfont
+      \let\tabucline \tabu@nocline
+      \let\tabu@firstcline \relax
+      \let\tabu@lines \relax
+   }
+}% light option
+\def\tabu@norowfont{\PackageError{tabu}
+   {\string\rowfont\space is not available with option `light'}\@ehd}
+\def\tabu@nocline{\PackageError{tabu}
+   {\string\tabucline\space is not available with option `light'}\@ehd}
+\ProcessOptions
+\AtBeginDocument{%
+   \@ifundefined{NC@rewrite@X}{\newcolumntype{X}{}}{}% new column X if not exists
+   \expandafter\in@\expandafter\@arrayright\expandafter{\endarray}%
+   \ifin@ \let\tabu@endarray\endarray
+   \else \tabu@fix@arrayright \fi % <fix for colortbl & arydshln (delarray)>
+   \@ifpackageloaded{colortbl} \tabu@colortbltrue \tabu@colortblfalse
+}
+\newcount\tabu@cnt
+\newcount\tabu@nbcols
+\newcount\tabu@X@cols
+\newdimen\tabu@target
+\newdimen\tabu@spreadtarget
+\newdimen\tabu@naturalX
+\newdimen\tabucolX
+\newdimen\tabu@X@sum
+\newif\iftabu@measuring
+\newif\iftabu@spread
+\newif\iftabu@nested
+\newif\iftabu@firstcline
+\newsavebox\tabu@box
+\def\tabu@gobblespace#1 {#1}
+\newcommand\tabu@NC@rewrite@X[1][]{\tabu@rewrite@X{#1}%
+                  \expandafter \NC@find \tabucolX@spec}
+\expandafter\def\csname NC@rewrite@\string\usetabu\endcsname#1{%
+   \ifx\\#1\\\tabu@saveerr{}\else
+      \@ifundefined{tabu@saved@\string#1}
+         {\tabu@saveerr{#1}}
+         {\let\tabu@rewrite@X \tabu@rewrite@Xrestore
+         \def\tabu@temp{\xdef\tabu@usetabu{%
+            \col@sep \the\col@sep\relax
+            \arrayrulewidth \the\arrayrulewidth\relax
+            \@tempdima \ht\@arstrutbox \advance\@tempdima -\extrarowheight
+            \extrarowheight \the\extrarowheight\relax
+            \advance\@tempdima \extrarowheight
+            \ht\@arstrutbox \@tempdima
+            \extratabsurround \the\extratabsurround\relax
+            \doublerulesep \the\doublerulesep\relax}}%
+         \aftergroup \tabu@usetabu
+         \csname tabu@saved@\string#1\expandafter\endcsname}%
+   \fi
+}% \NC@rewrite@\usetabu
+\expandafter\def\csname NC@find@\string\usetabu\endcsname#1\usetabu{\NC@{#1}}
+\expandafter\def\csname NC@rewrite@\string\tabu@rewritefirst\endcsname{%
+   \ifx\tabu@lines\relax
+   \NC@list\expandafter{\expandafter\NC@do \expandafter\usetabu
+                        \NC@do X\NC@do\tabu@rewritelast}%
+   \else
+   \NC@list\expandafter{\expandafter\NC@do \expandafter\usetabu
+                        \expandafter\NC@do \expandafter|\tabu@NC@list
+                        \NC@do X\NC@do\tabu@rewritelast}%
+      \tabu@lines % defines NC@rewrite@| for tabu only (inside @mkpream group)
+   \fi
+   \let\save@decl \tabu@save@decl % inversion of tokens in text mode
+   \let\NC@rewrite@X \tabu@NC@rewrite@X
+   \aftergroup \tabu@global@temp
+   \aftergroup \tabu@firstcline
+   \NC@find \tabu@rewritelast
+}% NC@rewrite@\tabu@rewritefirst
+\expandafter\def\csname NC@find@\string\tabu@rewritefirst\endcsname
+                                          #1\tabu@rewritefirst{\NC@{#1}}
+\def\tabu@rewritefirst{%
+   \edef\tabu@NC@list{\the\NC@list}%
+   \NC@list{\NC@do \tabu@rewritefirst \NC@do *}%
+}% \tabu@rewritefirst
+\expandafter\def\csname NC@rewrite@\string\tabu@rewritelast\endcsname{%
+   \global\NC@list\expandafter{\tabu@NC@list}%
+   \futurelet \tabu@temp \tabu@rewritelast
+}% \NC@rewrite@\tabu@rewritelast
+\expandafter\def\csname NC@find@\string\tabu@rewritelast\endcsname
+                                          #1\tabu@rewritelast{\NC@{#1}}
+\def\tabu@rewritelast{%
+   \ifx \@halignto\relax \let\tabu@temp \@empty
+   \else
+      \let\@halignto \tabu@halignto
+      \ifdim \tabu@target=\z@ \let\tabu@temp \@empty
+      \else
+         \if |\noexpand\tabu@temp \def\tabu@temp{@{\extracolsep\@flushglue}}\else
+         \if !\noexpand\tabu@temp \def\tabu@temp{@{\extracolsep\@flushglue}}\else
+                                  \def\tabu@temp{!{\extracolsep\@flushglue}}\fi\fi
+      \fi
+   \fi
+   \expandafter\NC@find \tabu@temp
+}% \tabu@rewritelast
+\newtoks\tabu@everycr@tok
+\newif\iftabu@colortbl
+\def\tabu@nowrite{% cancels a \write command (tabularx method)
+   \begingroup
+     \def\let{\afterassignment\endgroup\toks@}%
+        \afterassignment\let\count@
+}% \tabu@nowrite
+\let\tabu@write\write
+\def\tabu@phantomline{\noalign{%
+   \global\everycr{}%
+   \global\setbox\tabu@box\box\@arstrutbox
+   \toks@{}\count@\@ne
+   \@whilenum\count@<\tabu@nbcols\do{\advance\count@\@ne
+                        \toks@\expandafter{\the\toks@&}}%
+   \toks@\expandafter{\the\toks@
+      \cr\noalign{\global\setbox\@arstrutbox\box\tabu@box}}%
+   \expandafter}\the\toks@
+}% \tabu@phantomline
+\def\tabu{%
+   \ifmmode \def\endtabu{\endarray}%
+   \else    \def\endtabu{\endtabular}\fi
+   \tabu@setup \tabu@settarget
+}% \tabu
+\def\tabu@setup{%
+   \let\adl@xarraydashrule \tabu@adl@xarraydashrule % <fix> arydshln
+   \let\adl@act@endpbox \tabu@adl@act@endpbox       % <fix> arydshln
+   \let\adl@act@@endpbox \tabu@adl@act@endpbox      % <fix> arydshln
+   \let\endarray \tabu@endarray          % <fix> colortbl & arydshln (delarray)
+   \let\tabu@global@temp \@empty \let\tabu@global@X \@empty
+   \ifx\verbatim \tabu@sanitizetext
+         \tabu@nestedtrue
+         \def\tabu@aligndefault{t}\def\tabudefaulttarget{\linewidth}%
+   \else \tabu@nestedfalse
+         \def\tabu@aligndefault{c}%
+         \ifdim\parindent>\z@ \ifx\linewidth\tabudefaulttarget
+         \everypar\expandafter{%                    % correction for indentation
+            \the\everypar\everypar\expandafter{\the\everypar}%
+            \setbox\z@=\lastbox
+            \ifdim\wd\z@>\z@ \advance\linewidth -\wd\z@\fi
+            \box\z@
+            }%
+         \fi\fi
+   \fi
+   \let\@footnotetext \tabu@footnotetext
+   \let\@xfootnotenext\tabu@xfootnotetext
+   \iftabu@nested\else
+      \global\tabu@footnotes{}%
+      \aftergroup\the\aftergroup\tabu@footnotes
+   \fi
+   \let\centering \tabu@centering
+   \let\raggedright \tabu@raggedright
+   \let\raggedleft \tabu@raggedleft
+   \let\@trivlist \tabu@trivlist           %<restore \\=\@centercr inside lists>
+   \let\tabudecimal \tabu@tabudecimal
+   \let\verbatim \tabu@sanitizetext
+   \let\fbox \tabu@fbox
+   \let\prepnext@tok \tabu@prepnext@tok            % <for rowfont and tabucline>
+   \let\rowfont \tabu@rowfont
+   \tabu@spreadfalse \tabu@measuringfalse
+   \edef\tabu@hfuzz{\ifdim\hfuzz<.1\p@ .1\p@\else\the\hfuzz\fi}%
+   \tabu@rewritefirst
+}% \tabu@setup
+\def\tabu@save@decl{% no inversion on tokens when not in math mode
+   \ifcat$\d@llarend
+      \toks\count@\expandafter\expandafter\expandafter{%
+               \expandafter\@nextchar \the\toks\count@}%
+   \else
+      \toks\count@\expandafter\expandafter\expandafter{%
+         \expandafter\the\expandafter\toks\expandafter\count@\@nextchar}%
+   \fi
+}% \tabu@save@decl
+\def\tabu@settarget{\futurelet\@let@token \tabu@sett@rget}
+\def\tabu@sett@rget{\tabu@target\z@
+   \ifcase \ifx \bgroup\@let@token 0\else
+           \ifx [\@let@token 0\else
+           \ifx \@sptoken\@let@token 1\else
+           \if t\@let@token 2\else
+           \if s\@let@token 3\else
+           \m@ne\fi\fi\fi\fi\fi\relax
+       \expandafter\tabu@begin
+   \or \expandafter\tabu@gobblespace\expandafter\tabu@settarget
+   \or \expandafter\tabu@to
+   \or \expandafter\tabu@spread
+   \else\expandafter\tabu@begin
+   \fi
+}% \tabu@sett@rget
+\def\tabu@to to{\def\@halignto{to}\tabu@gettarget}
+\def\tabu@spread spread{\tabu@spreadtrue\def\@halignto{spread}\tabu@gettarget}
+\def\tabu@gettarget{\afterassignment\tabu@begin\tabu@target}
+\def\tabu@begin#1#{%
+   \edef\@halignto{\ifdim\tabu@target>\z@ \@halignto\the\tabu@target\fi}%
+   \let\tabu@halignto \@halignto
+   \expandafter\@testopt\expandafter\tabu@@begin \tabu@aligndefault #1\@nil
+}% \tabu@begin
+\def\tabu@@begin[#1]#2\@nil#3{%
+   \edef\tabu@align{#1}%
+   \edef\tabu@saved{%
+      \ifmmode \col@sep \the\arraycolsep
+      \else    \col@sep \the\tabcolsep     \fi\relax
+      \arrayrulewidth \the\arrayrulewidth\relax
+      \extrarowheight \the\extrarowheight\relax
+      \extratabsurround \the\extratabsurround\relax
+      \doublerulesep \the\doublerulesep\relax}%
+   \expandafter\def\expandafter\tabu@saved\expandafter{\tabu@saved
+            \tabu@temp \edef\tabu@halignto{to\the\tabu@target}\NC@find #3}%
+   \ifmmode \expandafter\array
+   \else    \expandafter\tabular
+   \fi      [{#1}]#2{\tabu@rewritefirst #3}%
+}% \tabu@@begin
+\newtoks\tabu@footnotes
+\long\def\tabu@footnotetext#1{%
+   \edef\@tempa{\the\tabu@footnotes
+      \noexpand\footnotetext [\the\csname c@\@mpfn\endcsname]}%
+   \global\tabu@footnotes\expandafter{\@tempa{#1}}}%
+\long\def\tabu@xfootnotetext[#1]#2{%
+  \global\tabu@footnotes\expandafter{\the\tabu@footnotes
+                           \footnotetext[{#1}]{#2}}}
+\def\tabu@rewrite@X#1{\tabu@Xarg{#1}%
+   \iftabu@spread \tabu@rewrite@Xspread
+   \else          \tabu@rewrite@Xto
+   \fi
+}% \tabu@rewrite@X
+\def\tabu@rewrite@Xnested#1{\def\tabucolX@spec{p{\tabucolX}}}
+\def\tabu@rewrite@Xrestore#1{\tabu@Xarg{#1}\let\tabucolX@spec\tabu@temp
+   \iftabu@measuring \else \tabu@measuringtrue \aftergroup\tabu@usetabuX \fi}%
+\def\tabu@usetabuX{%
+   \tabu@everycr\expandafter{\the\tabu@everycr\tabu@phantomline}%
+}% \tabu@usetabuX
+\def\tabu@rewrite@Xto{%
+   \iftabu@measuring % not the first X column found in preamble
+      \xdef\tabu@global@X {\tabu@global@X
+         \advance\tabu@X@sum \the\tabu@X@sum\relax}%
+   \else % first X column found in preamble
+      \tabu@measuringtrue
+      \ifdim\tabu@target=\z@
+         \setlength \tabu@target \tabudefaulttarget
+      \fi
+      \xdef\tabu@global@X{%
+         \tabu@X@sum \the\tabu@X@sum\relax
+         \tabu@target \the\tabu@target\relax}%
+      \let \@halignto \relax
+      \aftergroup \tabu@prep@TRIAL
+   \fi
+}% \tabu@rewrite@Xto
+\def\tabu@rewrite@Xspread{% tabu spread with X columns: we need to store each coef
+   \iftabu@measuring % not the first X column found in preamble
+      \advance\tabu@X@cols \@ne
+      \expandafter\let\csname tabu@X\the\tabu@X@cols\endcsname \relax
+      \xdef\tabu@global@X {\tabu@global@X
+            \advance\tabu@X@cols\@ne
+            \advance\tabu@X@sum \the\tabu@X@sum\relax
+            \def\csname tabu@X\the\tabu@X@cols\endcsname{\strip@pt\tabu@X@sum}}%
+   \else % first X column found in preamble
+      \tabu@measuringtrue
+      \tabu@X@cols \@ne  \tabu@spreadtarget=\tabu@target
+      \setlength \tabu@target \tabudefaulttarget
+      \expandafter\let\csname tabu@X\the\tabu@X@cols\endcsname \relax
+      \xdef\tabu@global@X {%
+         \tabu@X@cols \@ne
+         \tabu@X@sum \the\tabu@X@sum\relax
+         \tabu@target \the\tabu@target\relax
+         \tabu@spreadtarget \the\tabu@spreadtarget\relax
+         \def\csname tabu@X\the\tabu@X@cols\endcsname{\strip@pt\tabu@X@sum}}%
+      \let\@halignto \relax
+      \aftergroup \tabu@prep@TRIAL
+   \fi
+}% \tabu@rewrite@Xspread
+\def\tabu@Xarg#1{%
+   \ifx\\#1\\%    <shortcut when no option>
+      \tabu@X@sum \p@
+      \def\tabucolX@spec{p{\tabucolX}}%
+      \edef\tabu@temp{p{\the\tabucolX}}%  <required for \usetabu>
+   \else
+      \tabu@X@sum \z@
+      \let\tabucolX@align \@empty
+      \let\tabucolX@spec \@empty
+      \let\tabu@Xmath \relax
+      \tabu@Xparse {}#1\relax\@nnil
+   \fi
+}% \tabu@Xarg
+\def\tabu@Xparse#1{\futurelet\@let@token\tabu@Xtest}
+\expandafter\def\expandafter\tabu@Xparsespace\space{\tabu@Xparse{}}
+\def\tabu@Xtest{%
+   \ifcase \ifx \@nnil\@let@token \z@ \else
+           \ifx \relax\@let@token \m@ne\else
+           \if ,\@let@token \m@ne\else
+           \if p\@let@token 1\else
+           \if m\@let@token 2\else
+           \if b\@let@token 3\else
+           \if l\@let@token 4\else
+           \if c\@let@token 5\else
+           \if r\@let@token 6\else
+           \if .\@let@token 7\else
+           \ifx \@sptoken\@let@token 8\else
+           \if L\@let@token 9\else
+           \if C\@let@token 10\else
+           \if R\@let@token 11\else
+           \ifcat $\@let@token 12\else
+           13\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\relax
+       \tabucolX@do \expandafter\remove@to@nnil
+   \or \tabu@Xcolspec{p}%
+   \or \tabu@Xcolspec{m}%
+   \or \tabu@Xcolspec{b}%
+   \or \tabu@Xalign{>{\raggedright}}%
+   \or \tabu@Xalign{>{\centering}}%
+   \or \tabu@Xalign{>{\raggedleft}}%
+   \or \expandafter\tabu@Xcoef
+   \or \expandafter\tabu@Xparsespace
+   \or \tabu@Xalign{>{\RaggedRight}}%
+   \or \tabu@Xalign{>{\Centering}}%
+   \or \tabu@Xalign{>{\RaggedLeft}}%
+   \or \let\tabu@Xmath=$\expandafter\tabu@Xparse
+   \or \tabu@Xcoef{}%
+   \else \expandafter\tabu@Xparse
+   \fi
+}% \tabu@Xtest
+\def\tabu@Xalign#1{%
+   \ifx \tabucolX@align\@empty \else \PackageWarning{tabu}
+      {Duplicate horizontal alignment specification}\fi
+   \def\tabucolX@align{#1}\expandafter\tabu@Xparse
+}% \tabu@Xalign
+\def\tabu@Xcolspec#1{%
+   \ifx\tabucolX@spec\@empty\else \PackageWarning{tabu}
+      {Duplicate vertical alignment specification}\fi
+   \def\tabucolX@spec{#1}\expandafter\tabu@Xparse
+}% \tabu@Xcolspec
+\def\tabu@Xcoef#1{\def\@tempa{#1}%
+   \afterassignment\tabu@Xc@ef \tabu@cnt
+}% \tabu@Xcoef
+\def\tabu@Xc@ef{%
+   \advance\tabu@X@sum \@tempa\the\tabu@cnt\p@
+   \tabu@Xparse{}%
+}% \tabu@Xc@ef
+\def\tabucolX@do{%
+   \ifx\tabucolX@spec\@empty \def\tabucolX@spec{p}\fi
+   \ifdim \tabu@X@sum=\z@ \tabu@X@sum \p@\fi
+   \begingroup
+      \ifx \tabu@Xmath\relax
+         \edef\tabucolX@spec##1{\tabucolX@spec{##1}}%
+      \else
+         \edef\tabucolX@spec##1{>{$}\tabucolX@spec{##1}<{$}}%
+      \fi
+      \edef\tabu@temp{\dimexpr\strip@pt\tabu@X@sum \tabucolX \relax}%
+      \toks@\expandafter{\tabucolX@align}%
+      \edef\x{%
+         \def\noexpand\tabu@temp{\the\toks@ \tabucolX@spec{\the\tabu@temp}}%
+         \def\noexpand\tabucolX@spec{\the\toks@ \tabucolX@spec{\tabu@temp}}%
+      }\expandafter\endgroup\x
+}% \tabucolX@do
+\def\tabu@prep@TRIAL{%
+   \let\tabu@savedpreamble \@preamble
+   \def\savetabu {\tabu@saveX}%
+   {\ifnum0=`}\fi
+      \tabu@setup@TRIAL
+      \iftabu@spread % first trial only
+         \advance\tabu@X@cols \@ne
+         \expandafter\let\csname tabu@X\the\tabu@X@cols\endcsname \@undefined
+         \tabu@X@cols \z@ \tabu@naturalX \z@ \tabucolX \z@
+         \let\tabu@naturalX@max \z@
+         \let\tabu@naturalX@min \z@
+         \let\tabu@startpboxORI \@startpbox
+         \let\@startpbox \tabu@spread@startpbox
+      \else
+         \tabucolX = \tabu@target
+      \fi
+      \tabu@cnt \z@  % number of trials
+      \def\tabu@lasttry{\m@ne\p@}%
+      \tabu@arrayleft@measure
+}% \tabu@prep@TRIAL
+\def\tabu@setup@TRIAL{\tabu@global@X
+   \let\tabu@rewrite@X \tabu@rewrite@Xnested
+   \def\tabudefaulttarget{\linewidth}%
+   \def\@elt##1{\global\value{##1}\the\value{##1}\relax}%
+   \xdef\tabu@global@X {\cl@@ckpt}\let\@elt \relax
+   \hbadness\@M \hfuzz\maxdimen
+   \let\hbadness \@tempcnta
+   \let\hfuzz \@tempdima
+   \let\write \tabu@nowrite
+   \let\@footnotetext\@gobble
+   \let\tabu@saveX \@gobble
+   \tabu@TRIAL@hook
+}% \tabu@setup@TRIAL
+\let\tabu@TRIAL@hook\@empty
+\newcommand\tabuDisableCommands[1]{\g@addto@macro\tabu@TRIAL@hook{#1}}
+\def\tabu@arrayleft@measure#1\bgroup{%
+  \def\tabu@Xfinish{\ifnum0=`{\fi}\tabu@global@X
+         \let\@halignto\tabu@halignto \tabu@firstclinetrue  #1\bgroup}%
+  \toks@{\let\@preamble\tabu@savedpreamble}% <required for multicolumn>
+  \tabu@collect
+}% \tabu@arrayleft@measure
+\def\tabu@collect{\catcode`\^^@=13\def\tabu@stack{b}\tabu@collectbody}
+\long\def\tabu@collectbody#1\end#2{%
+   \edef\tabu@stack{\tabu@pushbegins #1\begin\end\expandafter\@gobble\tabu@stack}%
+   \ifx\tabu@stack\@empty
+      \toks@\expandafter{\the\toks@#1}\def\tabu@endenvir{\end{#2}}%
+      \expandafter\tabu@TRIAL
+   \else
+      \toks@\expandafter{\the\toks@#1\end{#2}}%
+      \expandafter\tabu@collectbody
+   \fi
+}% \tabu@collectbody
+\long\def\tabu@pushbegins#1\begin#2{\ifx\end#2\else b\expandafter\tabu@pushbegins\fi}
+\def\tabu@TRIAL{\setbox\tabu@box \hbox\bgroup $\@arrayleft\vbox\bgroup \the\toks@
+                                 \tabu@endTRIAL}% constant
+\def\tabu@endTRIAL{\endarray$\egroup
+   \iftabu@spread \tabu@spreadfalse
+      \let\@startpbox \tabu@startpboxORI
+      \tabu@spreadarith % <only once>
+   \else \tabu@arith
+   \fi
+   \iftabu@measuring \tabu@measuringfalse
+         \expandafter \tabu@TRIAL % <continue trials>
+   \else
+         \toks@\expandafter\expandafter\expandafter{%
+               \the\expandafter\toks@ \tabu@endenvir}%
+         \expandafter \tabu@Xfinish \the\toks@ % <we are then!>
+   \fi
+}% \tabu@endTRIAL
+\def\tabu@arith{%
+   \advance\tabu@cnt \@ne
+   \ifdim \tabu@lasttry=\wd\tabu@box
+      \tabu@message{\tabu@header Reached minimum width. Backing up}%
+   \else
+      \edef\tabu@lasttry{\the\wd\tabu@box}%
+      \tabu@message{\tabu@message@arith}%
+      \ifdim \dimexpr \wd \tabu@box - \tabu@target <\tabu@hfuzz
+         \tabu@message{\tabu@message@reached}%
+         \xdef\tabu@global@X {\tabu@target\the\tabu@target\relax \tabu@global@X
+                              \tabucolX \the\tabucolX\relax}%
+      \else
+         \advance\tabucolX -\dimexpr(\wd\tabu@box-\tabu@target-\tabu@X@sum/65536)
+                              *65536/\tabu@X@sum\relax
+         \ifdim \tabucolX<\z@
+            {\let\write\tabu@write\PackageWarning{tabu}
+               {X Columns too narrow (table too wide)\MessageBreak}}%
+               \tabucolX=1em%
+         \else \tabu@measuringtrue
+         \fi
+      \fi
+   \fi
+}% \tabu@arith
+\def\tabu@spreadarith{%
+   \tabu@naturalX \tabu@naturalX@max\relax
+   \tabucolX \tabu@naturalX@min\relax
+   \tabu@message{\tabu@message@spread}%
+   \ifdim \dimexpr \wd\tabu@box + \tabu@spreadtarget <\tabu@target
+      \advance\tabu@spreadtarget \dimexpr\wd\tabu@box-\tabu@naturalX+\tabucolX\relax
+      \ifdim \tabu@spreadtarget <\tabu@target
+         \tabu@target = \tabu@spreadtarget
+      \fi
+      \tabu@message{\expandafter\tabu@msg@align \the\tabu@target {}{}{}{}{}\@@}%
+      \tabu@message{\ifdim \tabu@spreadtarget>\tabu@target
+                           (tabu) default target used.\fi}%
+   \else
+      \tabu@message{\expandafter\tabu@msg@align \the\tabu@target { }{}{}{}{}\@@}
+      \tabu@message{(tabu)\ifdim\wd\tabu@box<\tabu@target spread too large\else
+                                                 tabu spread is useless here\fi,
+                    default target used.}%
+   \fi
+   \xdef\tabu@halignto {to\the\tabu@target}%
+   \tabucolX \tabu@target
+   \tabu@measuringtrue
+}% \tabu@spreadarith
+\def\tabu@message@arith{\tabu@header
+   \expandafter\tabu@msg@align \the\tabucolX { }{ }{ }{ }{}\@@
+   \expandafter\tabu@msg@align \the\wd\tabu@box { }{ }{ }{ }{}\@@
+   \expandafter\tabu@msg@align \the\tabu@target { }{ }{ }{ }{}\@@
+   \expandafter\tabu@msg@align \the\tabu@X@sum {}{}{}{}{}\@@
+   \expandafter\tabu@msg@align \the\dimexpr(\tabu@target-\wd\tabu@box)
+                                      *65536/\tabu@X@sum\relax {}{}{}{}{}\@@}
+\def\tabu@message@spread{\tabu@spreadheader
+   \expandafter\tabu@msg@align \the\tabu@spreadtarget {}{}{}{}{}\@@
+   \expandafter\tabu@msg@align \the\wd\tabu@box {}{}{}{}{}\@@
+   \expandafter\tabu@msg@align \the\tabucolX {}{}{}{}{}\@@
+   \expandafter\tabu@msg@align \expandafter-\the\tabu@naturalX {}{}{}{}{}\@@}
+\def\tabu@message@reached{\tabu@header
+   \expandafter\tabu@msg@align \the\tabucolX { }{ }{ }{ }{}\@@
+   ******** Reached Target : hfuzz=\tabu@hfuzz\space ********^^J}
+\def\do#1{%
+   \def\tabu@msg@align##1.##2##3##4##5##6##7##8##9\@@{%
+   \ifnum##1<10 #1#1#1\else
+   \ifnum##1<100 #1#1\else
+   \ifnum##1<\@m #1\fi\fi\fi
+   ##1.##2##3##4##5##6##7##8#1}%
+   \def\tabu@header{%
+      \ifnum\tabu@cnt=\@ne (tabu)
+       Try#1#1#1#1tabu X#1#1#1#1#1#1tabu Width#1#1#1#1#1Target%
+                  #1#1#1#1#1#1#1#1#1Coefs#1#1#1#1#1#1#1Update^^J\fi
+       (tabu) \ifnum\tabu@cnt<10 #1\fi\the\tabu@cnt)#1#1}%
+   \def\tabu@spreadheader{%
+      (tabu) Try#1#1#1#1Spread#1#1#1tabu Width#1#1#1#1#1Min Nat.#1#1#1#1Nat.X%
+                                              #1#1#1#1#1#1#1#1#1New Target^^J%
+      (tabu)spread}%
+}\do{ }
+\def\tabu@spread@startpbox#1{\bgroup
+   \in@{\tabucolX}{#1}%
+   \ifin@
+      \let\vss\relax\let\vfil\vss\let\vfill\vss\let\vskip\@tempskipa
+      \hbox to\tabu@target\bgroup\aftergroup\tabu@spread@endhbox\hfil
+   \else
+      \expandafter\@gobble\tabu@startpboxORI{#1}% \@gobble \bgroup
+   \fi
+}% \tabu@spread@startpbox
+\def\tabu@spread@endhbox{%
+   \ifnum\badness>\@M %<text does not fit>
+      \global\tabu@naturalX \tabu@target
+   \else
+      \setbox\tabu@box\lastbox
+      \setbox\tabu@box\hbox{\unhbox\tabu@box}%
+      \global\advance\tabu@X@cols \@ne
+      \ifcsname tabu@X\the\tabu@X@cols\endcsname
+         \global\advance\tabu@naturalX \wd\tabu@box
+      \else
+         \global\tabu@X@cols \@ne
+         \global\tabu@naturalX \wd\tabu@box
+      \fi
+      \ifdim \tabu@naturalX@max<\tabu@naturalX
+         \xdef\tabu@naturalX@max{\the\tabu@naturalX}%
+      \fi
+      \ifdim \tabu@naturalX@min<\dimexpr \wd\tabu@box * \tabu@X@sum /
+                  (65536*\csname tabu@X\the\tabu@X@cols\endcsname)\relax
+         \xdef\tabu@naturalX@min{\the\dimexpr \wd\tabu@box * \tabu@X@sum /
+                     (65536*\csname tabu@X\the\tabu@X@cols\endcsname)\relax}%
+      \fi
+   \fi
+   \box\tabu@box
+   \egroup % end of \vtop (measure)
+}% \tabu@spread@endhbox
+\def\tabu@tabudecimal#1{%
+   \def\tabu@decimal{#1}\@temptokena{}%
+   \let\tabu@getdecimal@ \tabu@getdecimal@ignorespaces
+   \tabu@scandecimal
+}% \tabudecimal
+\def\tabu@scandecimal{\futurelet \tabu@temp \tabu@getdecimal@}
+\def\tabu@skipdecimal#1{#1\tabu@scandecimal}
+\def\tabu@getdecimal@ignorespaces{%
+   \ifcase 0\ifx\tabu@temp\ignorespaces\else
+            \ifx\tabu@temp\@sptoken1\else
+            2\fi\fi\relax
+      \let\tabu@getdecimal@ \tabu@getdecimal
+      \expandafter\tabu@skipdecimal
+   \or \expandafter\tabu@gobblespace\expandafter\tabu@scandecimal
+   \else \expandafter\tabu@skipdecimal
+   \fi
+}% \tabu@getdecimal@ignorespaces
+\def\tabu@get@decimal#1{\@temptokena\expandafter{\the\@temptokena #1}%
+                        \tabu@scandecimal}
+\def\do#1{%
+   \def\tabu@get@decimalspace#1{%
+      \@temptokena\expandafter{\the\@temptokena #1}\tabu@scandecimal}%
+}\do{ }
+\def\tabu@getdecimal{%
+   \ifcase    0\ifx 0\tabu@temp\else
+               \ifx 1\tabu@temp\else
+               \ifx 2\tabu@temp\else
+               \ifx 3\tabu@temp\else
+               \ifx 4\tabu@temp\else
+               \ifx 5\tabu@temp\else
+               \ifx 6\tabu@temp\else
+               \ifx 7\tabu@temp\else
+               \ifx 8\tabu@temp\else
+               \ifx 9\tabu@temp\else
+               \ifx .\tabu@temp\else
+               \ifx ,\tabu@temp\else
+               \ifx -\tabu@temp\else
+               \ifx +\tabu@temp\else
+               \ifx e\tabu@temp\else
+               \ifx E\tabu@temp\else
+               \ifx\tabu@cellleft\tabu@temp1\else
+               \ifx\ignorespaces\tabu@temp1\else
+               \ifx\@sptoken\tabu@temp2\else
+            3\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\relax
+       \expandafter\tabu@get@decimal
+   \or \expandafter\tabu@skipdecimal
+   \or \expandafter\tabu@get@decimalspace
+   \else\expandafter\tabu@printdecimal
+   \fi
+}% \tabu@getdecimal
+\def\tabu@printdecimal{%
+   \edef\tabu@temp{\the\@temptokena}%
+   \ifx\tabu@temp\@empty\else
+   \ifx\tabu@temp\space\else
+      \expandafter\tabu@decimal\expandafter{\the\@temptokena}%
+   \fi\fi
+}% \tabu@printdecimal
+\newcommand*\tabuvline@rewrite[1][]{\tabuvline@arg{#1}%
+                     \expandafter \NC@find \tabu@temp}
+\def\tabu@vline#1{\vrule width#1}
+
+\def\tabuvline@arg#1{%
+   \ifx\\#1\\%    <shortcut when no option>
+      \def\tabu@temp{!{\tabu@vline\arrayrulewidth}}%
+   \else \futurelet \tabu@temp \tabuvline@argi #1\p@\p@\@nnil \tabuvline@argiii
+   \fi
+}% \tabuvline@arg
+\def\tabuvline@argi{%
+   \let\tabu@color \@empty
+   \ifcat A\noexpand\tabu@temp
+         \@tempdima\arrayrulewidth
+         \expandafter\tabu@getlinecolor
+   \else \expandafter\tabuvline@argii
+   \fi
+}% \tabuvline@argi
+\def\tabuvline@argii#1\@nnil{%
+   \tabu@maybecolor \@tempdima #1 \@nnil
+}% \tabuvline@argii
+\def\tabuvline@argiii{%
+   \edef\tabu@temp{!{\color@begingroup\tabu@color
+                     \noexpand\tabu@vline{\the\@tempdima}\color@endgroup}}%
+}% \tabuvline@argiii
+{
+\expandafter\let\csname NC@find@|\endcsname\relax
+\expandafter\let\csname NC@rewrite@|\endcsname\relax
+\xdef\tabu@lines{%
+   \let\csname NC@find@|\endcsname \noexpand\tabuvlines@find
+   \let\csname NC@rewrite@|\endcsname \noexpand\tabuvline@rewrite
+}% \tabu@vline
+}
+\def\tabuvlines@find#1|{\NC@{#1}}
+\def\tabu@firstcline{%
+   \tabu@firstclinetrue
+   \let\tabu@everycr\everycr
+   \def\tabu@restoreeverycr{\let\everycr\tabu@everycr}%
+   \def\everycr{\afterassignment\tabu@restoreeverycr\@temptokena}% <for ialign>
+   \tabu@everycr{\noalign{%
+      \global\tabu@everycr{\noalign{%
+            \global\tabu@everycr{}\global\tabu@firstclinefalse}}%
+      \global\let\everycr\tabu@everycr}}%
+}% \tabu@firstcline
+\def\tabu@linedash{4pt}%   <default value>
+\def\tabu@dashgap{4pt}%    <default value>
+\def\tabucline{\noalign{\ifnum0=`}\fi\@ifstar
+   {\@tempswatrue\tabu@cline}
+   {\@tempswafalse\tabu@cline}}%
+\newcommand*\tabu@cline[2][]{%
+   \tabu@startstop{#2}\tabu@getlinespec{#1}\@multicnt\@ne
+   \ifnum\tabu@start>\tabu@stop \the\toks@
+   \else\ifx\tabu@xleaders\relax\the\toks@
+   \else
+      \toks@{\ifnum0=`{\fi}\noalign{\global\setbox\tabu@box \box\@arstrutbox}}%
+      \iftabu@firstcline\if\tabu@align t\vskip-\ht\@arstrutbox\fi\fi
+      \@whilenum\@multicnt<\tabu@start\do{\advance\@multicnt\@ne
+                              \toks@\expandafter{\the\toks@ &}}%
+      \loop
+         \toks@\expandafter{\the\toks@ \omit }%
+         \ifcase 0\if@tempswa\else\ifnum \@multicnt>\tabu@start 1\fi\fi\relax
+         \expandafter \tabu@add \csname tabu@tok@\the\@multicnt L\endcsname \@nil
+         \fi
+         \ifcase 0\if@tempswa\else\ifnum \@multicnt<\tabu@stop 1\fi\fi\relax
+            \toks@\expandafter{\the\toks@ \color@begingroup}%
+            \toks@\expandafter\expandafter\expandafter{\expandafter\the
+                              \expandafter\toks@ \tabu@xleaders \color@endgroup}%
+         \fi
+         \ifcase 0\if@tempswa\else\ifnum \@multicnt<\tabu@stop 1\fi\fi %
+         \expandafter \tabu@add \csname tabu@tok@\the\@multicnt R\endcsname \@nil
+         \fi
+         \ifnum\@multicnt<\tabu@stop
+            \advance\@multicnt\@ne
+            \if@tempswa \toks@\expandafter{\the\toks@ &}%
+            \else       \toks@\expandafter{\the\toks@ \span}\fi
+      \repeat
+      \@whilenum\@multicnt<\tabu@nbcols\do{\advance\@multicnt\@ne
+                              \toks@\expandafter{\the\toks@ &}}%
+      \toks@\expandafter{\the\toks@ \cr \noalign{%
+           \global\tabu@firstclinefalse \global\setbox\@arstrutbox \box\tabu@box}}%
+      \the\toks@
+   \fi\fi
+}% \tabucline
+\def\tabu@add #1\@nil{\toks@\expandafter{\the\toks@ #1\ifmmode$\fi}}
+\def\tabu@startstop#1{\tabu@start@stop #1\relax 1-\tabu@nbcols\@nnil}
+\def\tabu@start@stop #1-#2\@nnil{%
+   \countdef\tabu@start100\countdef\tabu@stop101 % <inside noalign group>
+   \@defaultunits \tabu@start \number0#1\relax\@nnil
+   \@defaultunits \tabu@stop  \number0#2\relax\@nnil
+   \ifnum\tabu@start>\tabu@nbcols\tabu@start=\tabu@nbcols\else
+      \ifnum\tabu@start>\z@\else \tabu@start=\@ne        \fi\fi
+   \ifnum\tabu@stop>\tabu@nbcols \tabu@stop\tabu@nbcols  \else
+      \ifnum\tabu@stop>\z@\else  \tabu@stop=\tabu@nbcols \fi\fi
+}% \tabu@start@stop
+\def\tabu@getlinespec#1{\let\tabu@xleaders \relax
+   \@defaultunits \let\@tempa=#1 \relax\@nnil
+   \ifx\@tempa\relax \let\tabu@xleaders \tabu@defaultleaders\else
+   \ifx\@tempa\hbox  \tabu@defleaders{#1}\else
+   \ifx\@tempa\box   \tabu@defleaders{#1}\else
+   \ifx\@tempa\copy  \tabu@defleaders{#1}\else
+   \ifcsname tabu@line@style@\string#1\endcsname
+      \csname tabu@line@style@\string#1\endcsname
+   \else \tabu@getline{#1\p@ on0pt off0pt}\fi\fi\fi\fi\fi
+}% \tabu@getlinespec
+\def\tabu@defleaders#1{%
+   \def\tabu@xleaders{\xleaders\hbox{\lower.5\extrarowheight#1}\tabu@leaderfill}}
+\def\tabucline@warn#1{\PackageWarning{tabu}
+   {Undefined line syle: #1
+   \MessageBreak Using default line style instead}%
+   \let\tabu@xleaders \tabu@defaultleaders
+}% \tabucline@warn
+\def\tabu@getline#1{\tabu@lineon #1 \@nil on\tabu@linedash \p@ \@nil\@nnil{#1}}
+\def\tabu@maybecolor{\ifx\tabu@color\@empty \afterassignment\tabu@colortest
+                     \else \@defaultunits\fi}
+\def\tabu@lineon #1on#2\@nil#3\@nnil#4{%
+   \let\tabu@color \@empty
+   \@defaultunits \let\@tempa=#1 \relax\@nnil
+   \ifcase 0\ifx o\@tempa 1\else\ifcat A\noexpand\@tempa 2\fi\fi\relax
+      \tabu@maybecolor \@tempdima #1\arrayrulewidth \p@\@nnil
+      \tabu@maybecolor \@tempdimb #2\p@ \@nnil
+      \tabu@lineoff #1 on#2 off\tabu@dashgap \p@ \@nnil
+   \or\@tempdima \arrayrulewidth
+      \tabu@maybecolor \@tempdimb #2\p@ \@nnil
+      \tabu@lineoff #1 on#2 off\tabu@dashgap \p@ \@nnil
+   \else
+      \tabu@maybecolor \@tempdima \arrayrulewidth #1\p@\@nnil
+      \ifx\tabu@color\@empty \tabucline@warn{#4}\else
+      \@tempdimb \z@
+      \tabu@lineoff off0pt \p@\@nnil \fi
+   \fi
+}% \tabu@lineon
+\def\tabu@lineoff #1off#2\@nnil{%
+   \tabu@maybecolor \@tempdimc #2\p@ \@nnil
+   \ifdim \@tempdimb=\z@
+      \ifdim \@tempdimc>\z@ \@tempdimb \tabu@dashgap\relax\fi\fi
+   \ifdim \@tempdimc=\z@
+      \ifdim \@tempdimb>\z@ \@tempdimc \tabu@linedash\relax\fi\fi
+   \ifdim \@tempdima<\z@ \else
+   \ifdim \@tempdimb<\z@ \else
+   \ifdim \@tempdimc<\z@ \else
+      \edef \tabu@xleaders{\tabu@color\xleaders
+         \ifdim\@tempdimc>\z@
+            \hbox\bgroup \kern\the\dimexpr\@tempdimc/2\relax\fi
+         \noexpand\iftabu@firstcline
+         \vrule depth\the\@tempdima
+                \ifdim\@tempdimb>\z@ width\the\@tempdimb\fi
+         \noexpand\else
+         \vrule height\dimexpr-\extrarowheight+\the\@tempdima
+                depth\extrarowheight
+               \ifdim\@tempdimb>\z@ width\the\@tempdimb\fi
+         \noexpand\fi
+         \ifdim\@tempdimc>\z@
+            \kern\the\dimexpr\@tempdimc/2\egroup\fi
+         \tabu@leaderfill}%
+   \fi\fi\fi
+}% \tabu@lineoff
+\def\tabu@colortest{\futurelet\tabu@temp\tabu@linecolor}
+\def\tabu@linecolor{%
+   \ifcase 0\if ,\noexpand\tabu@temp\else
+            \ifx\relax\tabu@temp\else
+            \ifx \@sptoken\tabu@temp1\else
+            \ifcat A\noexpand\tabu@temp2\else
+            3\fi\fi\fi\fi\relax
+   \def\tabu@next##1{\futurelet\tabu@temp\tabu@linecolor}%
+   \or\def\tabu@next{\tabu@gobblespace{\futurelet\tabu@temp\tabu@linecolor}}%
+   \or\let\tabu@next\tabu@getlinecolor
+   \else\expandafter\remove@to@nnil
+   \fi \tabu@next
+}% \tabu@linecolor
+\def\tabu@getlinecolor#1\p@{%
+   \edef\@tempa{\zap@space #1 \@empty}%
+   \ifcsname\string\color@\@tempa\endcsname
+      \edef\tabu@color{\noexpand\noexpand\noexpand\color{\@tempa}}%  \set@color
+   \fi\remove@to@nnil
+}% \tabu@getlinecolor
+\def\tabulinestyle#1{\@for\@tempa:=#1\do{\expandafter\tabu@linestyle\@tempa==\@nil}}
+\def\tabu@linestyle#1=#2=#3\@nil{%
+   \begingroup \tabu@getlinespec {#2}\expandafter\gdef
+         \csname tabu@line@style@\string#1\expandafter\endcsname
+                     \expandafter{\expandafter\def\expandafter\tabu@xleaders
+                                                \expandafter{\tabu@xleaders}}%
+   \endgroup
+}% \tabu@linestyle
+\expandafter\def \csname tabu@line@style@\endcsname {%
+                                     \let\tabu@xleaders \tabu@defaultleaders}%
+\def\tabu@defaultleaders{\leaders
+   \iftabu@firstcline
+      \vrule  depth \arrayrulewidth
+   \else
+      \vrule  height\dimexpr-\extrarowheight+\arrayrulewidth
+              depth \extrarowheight
+   \fi
+   \tabu@leaderfill}
+\let\tabu@leaderfill \hfil
+{\catcode32=13\relax\catcode`\^^@=13\relax
+\gdef\tabu@verb{\@sanitize\makeatletter\catcode`\^=7\edef\^{\string^}%
+\catcode32=13\let =\ \catcode`\^^@=13\def^^@{\par}\endlinechar\m@ne}%
+}
+\newcommand\tabu@sanitizetext[1][\ttfamily]{\begingroup
+                        \tabu@verb #1\tabu@s@nitizetext}
+\long\def\tabu@s@nitizetext#1{\@makeother\{\@makeother\}%
+            \everyeof{\noexpand}\scantokens{#1}\endgroup}
+\newcommand*\savetabu[1]{\noalign{%
+   \ifx\\#1\\\tabu@savewarn{}{The tabu will not be saved}\else
+      \@ifundefined{tabu@save@\string#1}{}{\tabu@savewarn{#1}{Overwritting}}%
+      {\toks@\expandafter{\tabu@saved}%
+      \expandafter\xdef\csname tabu@saved@\string#1\endcsname{%
+         \tabu@target\the\tabu@target\relax
+         \the\toks@}}%
+   \fi}%
+}% \savetabu
+\def\tabu@saveX#1{\noalign{%
+   \ifx\\#1\\\tabu@savewarn{}{The tabu will not be saved}\else
+      \@ifundefined{tabu@saved@\string#1}{}{\tabu@savewarn{#1}{Overwritting}}%
+      {\toks@\expandafter{\tabu@saved}%
+      \expandafter\xdef\csname tabu@saved@\string#1\endcsname{%
+         \tabucolX\the\tabucolX\relax
+         \tabu@target\the\tabu@target\relax
+         \the\toks@}}%
+   \fi}%
+}% \tabu@saveX
+\def\tabu@savewarn#1#2{\PackageInfo{tabu}
+   {User-name `#1' already used for \string\savetabu
+   \MessageBreak #2}}%
+\def\tabu@saveerr#1{\PackageError{tabu}
+   {User-name `#1' is unknown for \string\usetabu
+   \MessageBreak I cannot restore an unknown preamble!}\@ehd}
+\def\tabu@rowfont{\noalign{\ifnum0=`}\fi\tabu@row@font}
+\newcommand*\tabu@row@font[2][]{%
+   \global\tabu@everycr@tok=\everycr
+   \global\let\tabu@@cellleft \tabu@cellleft
+   \global\let\tabu@@cellright \tabu@cellright
+   \gdef\tabu@cellfont{#2}%
+   \ifcsname tabu@cell@#1\endcsname  % row alignment
+         \csname tabu@cell@#1\endcsname \fi
+   \toks@\expandafter {\tabu@cellleft\tabu@cellfont}% inside \noalign group ok
+   \xdef\tabu@cellleft {\the\toks@}%
+   \global\everycr\expandafter {\the\everycr\tabu@rowfont@reset}%
+   \ifnum0=`{\fi}% end of noalign group
+}% \rowfont
+\def\tabu@rowfont@reset{%
+   \noalign{%
+      \global\let\tabu@cellleft \tabu@@cellleft
+      \global\let\tabu@cellright \tabu@@cellright
+      \global\let\tabu@cellfont \@empty
+      \global\let\tabu@celllalign \@empty
+      \global\let\tabu@cellralign \@empty
+      \global\everycr=\tabu@everycr@tok
+      \global\tabu@everycr@tok{}%
+   }%
+}% \tabu@rowfont@reset
+\newif\iftabu@cellright
+\AtBeginDocument{\let\array@prepnext@tok \prepnext@tok }% original definition
+\def\tabu@prepnext@tok{%
+   \ifnum \count@<\z@  % <first initialisation>
+      \@tempcnta \@M   % <not initialized by array.sty>
+      \tabu@nbcols\z@
+      \gdef\tabu@global@temp{\tabu@nbcols\z@}%
+      \expandafter\let\csname tabu@tok@1L\endcsname \relax
+      \tabu@cellrightfalse
+   \else
+      \ifcase \numexpr \count@-\@tempcnta \relax % (case 0): prev. token is left
+         \advance \tabu@nbcols\@ne
+         \ifnum \tabu@nbcols>\@ne
+         \expandafter\let\csname tabu@tok@\the\tabu@nbcols L\endcsname \relax
+         \fi
+         \expandafter\let\csname tabu@tok@\the\tabu@nbcols R\endcsname \relax
+         \expandafter\gdef\expandafter\tabu@global@temp\expandafter{%
+                           \tabu@global@temp \advance\tabu@nbcols\@ne}%
+         \iftabu@cellright % before-previous token is right and is finished
+            \tabu@cellrightfalse % <only once>
+            \tabu@savetok R\tabu@preptokenright
+         \fi
+         \tabu@savetok L\tabu@preptokenleft
+      \or                     % (case 1) previous token is right
+         \tabu@savetok R\tabu@cellrighttrue
+      \else % special column: do not change the token
+         \ifnum \tabu@nbcols>\z@ %special column: always on the right of normal one
+         \else % unless this is the very first column (\tabu@nbcols=0)
+            \advance\tabu@nbcols\@ne \tabu@savetok L\advance\tabu@nbcols\m@ne
+         \fi
+         \iftabu@cellright    % before-previous token is right
+            \tabu@cellrightfalse
+            \tabu@savetok R\tabu@preptokenright
+         \fi
+      \fi % \ifcase
+   \fi
+   \array@prepnext@tok
+}% \tabu@prepnext@tok
+\def\tabu@preptokenright{%
+   \advance \count@ \m@ne
+   \toks\count@\expandafter {\the\toks\count@ \tabu@cellright \tabu@cellralign}%
+   \advance \count@ \@ne
+}% \tabu@preptokenright
+\def\tabu@preptokenleft{\toks\count@\expandafter {\expandafter\tabu@celllalign
+                                             \the\toks\count@ \tabu@cellleft}%
+}% \tabu@preptokenleft
+\def\tabu@savetok#1{\begingroup
+   \expandafter\tabu@savet@k\csname tabu@tok@\the\tabu@nbcols #1\endcsname
+}% \tabu@savetok
+\def\tabu@savet@k#1{%
+   \@temptokena\toks\count@
+   \ifx#1\relax\else \@temptokena\expandafter\expandafter
+                     \expandafter{\expandafter#1\the\@temptokena}%
+   \fi
+   \@temptokena\expandafter{\expandafter\def\expandafter#1\expandafter{%
+                                                      \the\@temptokena}}%
+   \toks@\expandafter\expandafter\expandafter{\expandafter\tabu@global@temp
+                                                      \the\@temptokena}%
+   \xdef\tabu@global@temp{\the\toks@}%
+   \expandafter\endgroup \the\@temptokena
+}% \tabu@savetok
+\let\tabu@cellleft\@empty
+\let\tabu@cellright\@empty
+\def\tabu@celllalign{\tabu@cellleft}% row font spec. applies to pre-column material
+\let\tabu@cellralign\@empty
+\let\tabu@cellfont\@empty
+\def\tabu@cell@l{% force alignment to left
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \raggedright\arraybackslash
+                        \tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@flush1\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\raggedright\arraybackslash}% local
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@l
+\def\tabu@cell@c{% force alignment to center
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \centering\arraybackslash
+                        \tabu@flush{.5}\tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@flush{.5}\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\centering\arraybackslash}% local
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@c
+\def\tabu@cell@r{% force alignment to right
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \raggedleft\arraybackslash
+                        \tabu@flush1\tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\raggedleft\arraybackslash}% local
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@r
+\def\tabu@cell@j{% force justification (for p, m, b columns)
+   \gdef\tabu@celllalign{\tabu@justify\tabu@cellleft}%
+   \global\let\tabu@cellralign\@empty
+   \toks@\expandafter{\tabu@cellleft\tabu@justify}% local (noalign grp)
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@j
+\def\tabu@justify{%
+   \leftskip\z@skip \@rightskip\leftskip \rightskip\@rightskip
+   \parfillskip\@flushglue
+}% \tabu@justify
+%% ragged2e settings
+\def\tabu@cell@L{% force alignment to left (ragged2e)
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \RaggedRight\arraybackslash
+                        \tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@flush1\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\RaggedRight\arraybackslash}%
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@L
+\def\tabu@cell@C{% force alignment to center (ragged2e)
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \Centering\arraybackslash
+                        \tabu@flush{.5}\tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@flush{.5}\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\Centering\arraybackslash}%
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@C
+\def\tabu@cell@R{% force alignment to right (ragged2e)
+   \gdef\tabu@celllalign{\tabu@removehfil
+                        \RaggedLeft\arraybackslash
+                        \tabu@flush1\tabu@cellleft}%
+   \gdef\tabu@cellralign{\tabu@ignorehfil}%
+   \toks@\expandafter{\tabu@cellleft\RaggedLeft\arraybackslash}%
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@R
+\def\tabu@cell@J{% force justification (ragged2e)
+   \gdef\tabu@celllallign{\justifying\arraybackslash\tabu@cellleft}%
+   \global\let\tabu@cellralign\@empty
+   \toks@\expandafter{\tabu@cellleft\justifying\arraybackslash}%
+   \xdef\tabu@cellleft{\the\toks@}%
+}% \tabu@cell@J
+\def\tabu@flush#1{%
+   \iftabu@colortbl      % colortbl uses \hfill rather than \hfil
+      \hskip \ifnum\currentgrouptype>13 \stretch{#1}%
+      \else\ifdim#1pt<1pt \tabu@cellskip
+      \else \stretch{#1}
+      \fi\fi \relax
+   \else                % array.sty
+      \ifnum \currentgrouptype>13\relax
+         \hfil \hskip1sp
+      \fi
+   \fi
+}% \tabu@flush
+\AtBeginDocument{%
+   \@ifpackageloaded{ragged2e}
+      {}
+      {\let\tabu@cell@L \tabu@cell@l
+       \let\tabu@cell@R \tabu@cell@r
+       \let\tabu@cell@C \tabu@cell@c
+       \let\tabu@cell@J \tabu@cell@j
+      }%
+}% AtBeginDocument
+\newskip\tabu@cellskip
+\let\tabu@hfil\hfil
+\let\tabu@hfill\hfill
+\let\tabu@hskip\hskip
+\def\tabu@removehfil{%
+   \iftabu@colortbl
+      \unkern \tabu@cellskip = \lastskip
+      \ifnum\gluestretchorder\tabu@cellskip = \tw@ \hskip-\tabu@cellskip
+      \else \tabu@cellskip = \z@skip
+      \fi
+   \else
+      \ifdim\lastskip=1sp\unskip\fi
+      \ifnum\gluestretchorder\lastskip = \@ne
+         \hfilneg % \hfilneg for array.sty but not for colortbl...
+      \fi
+   \fi
+}% \tabu@removehfil
+\def\tabu@ignorehfil{%
+   \aftergroup\tabu@nohfil
+}% \tabu@ignorehfil
+\def\tabu@nohfil{% \hfil -> do nothing + restore original \hfil
+   \def\hfil{\let\hfil\tabu@hfil}%   local to (alignment template) group
+}% \tabu@nohfil
+\AtBeginDocument{%
+   \@ifpackageloaded{colortbl}
+   {%
+   \def\tabu@nohfil{%
+      \def\hfil{\let\hfil\tabu@hfil}% local to (alignment template) group
+      \def\hfill{\let\hfill\tabu@hfill}% (colortbl uses \hfill) pfff...
+      \def\hskip##1\relax{\let\hskip\tabu@hskip}}% local
+   }% @ifpackageloaded colortbl
+   {}%
+}% AtBeginDocument
+\def\tabu@fbox{%
+   \leavevmode
+   \let\color@bgroup\bgroup
+   \def\color@egroup{\endgraf\egroup}%
+   \afterassignment\tabu@begin@fbox
+      \setbox\@tempboxa \hbox
+}% \tabu@fbox
+\def\tabu@begin@fbox{\color@bgroup\kern\fboxsep\aftergroup\tabu@end@fbox}
+\def\tabu@end@fbox{\kern\fboxsep\color@egroup\@frameb@x\relax}
+\expandafter\def\expandafter\tabu@centering\expandafter{%
+                                                \centering\arraybackslash}
+\expandafter\def\expandafter\tabu@raggedleft\expandafter{%
+                                                \raggedleft\arraybackslash}
+\expandafter\def\expandafter\tabu@raggedright\expandafter{%
+                                                \raggedright\arraybackslash}
+\AtBeginDocument{%
+\expandafter\def\expandafter\tabu@trivlist\expandafter{%
+   \expandafter\let\expandafter\\\expandafter\@centercr\@trivlist}%
+}%
+\def\tabu@fix@arrayright{%
+   \@ifpackageloaded{arydshln}
+   {%
+   \@ifpackageloaded{colortbl}
+      {%% colortbl + arydshln
+      \def\tabu@endarray{%
+         \adl@endarray \egroup \adl@arrayrestore \CT@end \egroup %<original>
+         \@arrayright     % <FC>
+         \gdef\@preamble{}% <FC>
+                  }}% \endarray
+      {%% arydshln / no colortbl
+      \def\tabu@endarray{%
+         \adl@endarray \egroup \adl@arrayrestore \egroup %<original>
+         \@arrayright     % <FC>
+         \gdef\@preamble{}% <FC>
+                  }}% \endarray
+   }%
+   {%
+   \@ifpackageloaded{colortbl}
+      {%% colortbl / no arydshln
+      \def\tabu@endarray{%
+         \crcr \egroup \egroup
+         \@arrayright  % <FC>
+         \gdef\@preamble{}\CT@end
+                  }}%
+      {\PackageWarning{tabu}
+         {\string\@arrayright\space is missing from the
+         \MessageBreak definition of \string\endarray.
+         \MessageBreak Comptability with delarray.sty is broken.}}%
+   }%
+}% \tabu@fix@arrayright
+\def\tabu@adl@xarraydashrule#1#2#3{%
+     \ifnum\@lastchclass=\adl@class@start\else
+     \ifnum\@lastchclass=\@ne\else
+     \ifnum\@lastchclass=5 \else % <FC> @-arg (class 5) and !-arg (class 1)
+             \adl@leftrulefalse \fi\fi           % must be treated the same
+     \fi
+     \ifadl@zwvrule\else \ifadl@inactive\else
+             \@addtopreamble{\vrule\@width\arrayrulewidth
+                     \@height\z@ \@depth\z@}\fi \fi
+     \ifadl@leftrule
+             \@addtopreamble{\adl@vlineL{\CT@arc@}{\adl@dashgapcolor}%
+                     {\number#1}#3}%
+     \else   \@addtopreamble{\adl@vlineR{\CT@arc@}{\adl@dashgapcolor}%
+                     {\number#2}#3}
+     \fi
+}% \tabu@adl@xarraydashrule
+\def\tabu@adl@act@endpbox{%
+   \unskip \ifhmode \nobreak \fi    \@finalstrut \@arstrutbox
+   \egroup
+   \adl@colhtdp \box\adl@box \hfil
+}% \tabu@adl@act@endpbox
+
+\endinput
+%%
+%% End of file `tabu.sty'.
diff --git a/Master/tlpkg/bin/tlpkg-ctan-check b/Master/tlpkg/bin/tlpkg-ctan-check
index 40c6302683e..2a84cf5d763 100755
--- a/Master/tlpkg/bin/tlpkg-ctan-check
+++ b/Master/tlpkg/bin/tlpkg-ctan-check
@@ -308,7 +308,7 @@ my @TLP_working = qw(
     swebib swimgraf syllogism syntax synproof syntrace synttree
   t-angles t2
     tableaux tablenotes tablists tablor tabls tabto-generic tabto-ltx
-    tabularborder tabularcalc tabularew
+    tabu tabularborder tabularcalc tabularew
     tabulary tabvar talk
     tamethebeast tapir tdclock tdsfrmath
     technics ted templates-fenn templates-sommer tengwarscript
diff --git a/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc b/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
index c9ef7556afa..8adadb2217a 100644
--- a/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
+++ b/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
@@ -626,6 +626,7 @@ depend tablenotes
 depend tablists
 depend tabls
 depend tabto-ltx
+depend tabu
 depend tabularborder
 depend tabularcalc
 depend tabularew
diff --git a/Master/tlpkg/tlpsrc/tabu.tlpsrc b/Master/tlpkg/tlpsrc/tabu.tlpsrc
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/Master/tlpkg/tlpsrc/tabu.tlpsrc