rm xfrac, per morten

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-%\iffalse meta-comment
-% File `xfrac.dtx'.
-% Copyright 2004 Morten H\o gholm.
-% moho01ab@student.cbs.dk
-%
-% It 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
-% and version 1.3 or later is part of all distributions of LaTeX
-% version 2003/12/01 or later.
-%
-% This work has the LPPL maintenance status "maintained".
-%
-% The Current Maintainer of this work is Morten H\o gholm.
-%
-% This work consists of the files xfrac.dtx, xfrac.ins and the
-% derived file xfrac.sty.
-%
-%<package>\NeedsTeXFormat{LaTeX2e}[2003/12/01]
-%<package>\ProvidesPackage{xfrac}
-%<package>    [2004/10/10 v0.11b Slashed Fractions (MH)]
-%
-%<*driver>
-\RequirePackage{fix-cm}
-\documentclass{ltxdoc}
-\usepackage{xfrac}
-\usepackage{nicefrac}
-\usepackage[latin1]{inputenc}
-\usepackage[T1]{fontenc}
-\makeatletter
-\newenvironment{TemplateInterfaceDescription}[1]
-  {\subsection{The Template Type `#1'}%
-   \begingroup
-   \@beginparpenalty\@M
-   \description
-   \def\TemplateArgument##1##2{\item[Arg: ##1]##2\par}%
-   \def\TemplateSemantics{\enddescription\endgroup
-       \subsubsection*{Semantics:}}%
-  }
-  {\par\bigskip}
-
-\newenvironment{TemplateDescription}[2]
-  {\subsection{The Template `#2' (type #1)}%
-   \subsubsection*{Attributes:}%
-   \begingroup
-   \@beginparpenalty\@M
-   \description
-   \def\TemplateKey##1##2##3##4{\item[##1 (##2)]##3%
-     \ifx\TemplateKey##4\TemplateKey\else
-%         \hskip0ptplus3em\penalty-500\hskip 0pt plus 1filll Default:~##4%
-         \hfill\penalty500\relax\qquad \hbox{}\hfill Default:~##4%
-         \nobreak\hskip-\parfillskip\hskip0pt\relax
-     \fi
-     \par}%
-   \def\TemplateSemantics{\enddescription\endgroup
-       \subsubsection*{Semantics \& Comments:}}%
-  }
-  {\par\bigskip}
-
-\renewcommand*\MakePrivateLetters{\makeatletter\catcode`\_=11\relax}
-\makeatother
-
-\providecommand*\eTeX{\ensuremath{\varepsilon}-\kern-.125em\TeX}
-\providecommand*\LaTeXplus{\LaTeXe$*$}
-\providecommand*\key[1]{\textbf{#1}}
-\providecommand*\package[1]{\textsf{#1}}
-\newcommand*\switch[2]{{\fontfamily{#1}\selectfont #2}}
-
-
-\begin{document}
-  \DocInput{xfrac.dtx}
-\end{document}
-%</driver>
-% \fi
-%
-%  \GetFileInfo{xfrac.sty}
-%  \CheckSum{320}
-%
-%  \changes{v0.11}{2004/05/08}{Consistent naming}
-%
-%  \changes{v0.10a}{2004/04/06}{Added a dependency of the latest
-%  \LaTeX{} release}
-%  \changes{v0.10a}{2004/04/06}{First version on \textsc{ctan}}
-%
-%  \changes{v0.10}{2004/04/05}{First publicly available prototype
-%  implementation}
-%
-%  \title{The \package{xfrac} package\thanks{This file has version number
-%  \fileversion, last revised \filedate.}}
-%
-%  \author{Morten H\o gholm}
-%  \date{\filedate}
-%
-%  \maketitle
-%
-%  \begin{abstract}
-%  This package uses a template interface to produce nicely looking
-%  \emph{split level} fractions like \nicefrac{7}{9}\ldots{}
-%  ehrm\ldots{} I mean \sfrac{7}{9}.
-%  \end{abstract}
-%
-%  \tableofcontents
-%
-%  \section{A Bit of History}
-%
-%  \subsection{The Past}
-%
-%  One of the first exercises in \emph{The \TeX Book} is to design a
-%  macro for split level fractions. The solution shows a level of
-%  simplicity only rivaled by its fundamental design flaws: It can
-%  only be used when the text font and the math font are the same and
-%  worse still it uses a \emph{virgule} (a slash) for separating the
-%  two components. The proper symbol for that is a \emph{solidus}
-%  which sadly is absent from Computer Modern. It is however
-%  available in the European Computer Modern fonts, but I'll get back
-%  to that.
-%
-%  \subsection{The Present}
-%
-%  So how does people produce split level fractions nowadays? The
-%  answer is that they use the \package{nicefrac} package. For text
-%  it gives you \nicefrac{1}{2}, while the built-in
-%  \package{textcomp} symbol is \textonehalf. Hmmm, bad example due
-%  to the strange design of the EC fonts. Lets try Palatino instead.
-%  Then |\nicefrac{1}{2}| produces \switch{ppl}{\nicefrac{1}{2}}
-%  while the built-in symbol is \switch{ppl}{\textonehalf}, and it's
-%  plain to see the problems; a)~it uses the virgule instead of the
-%  solidus and b)~the font size of the numerator and the denominator
-%  is bigger than in the built-in symbol. We'll have to take care of
-%  this somehow.
-%
-%  Another problem arises when the font has old  style figures as the
-%  \package{eco} package provides for Computer Modern. Here we get
-%  results like  \switch{cmor}{\nicefrac{1}{2}} and
-%  \switch{cmor}{\nicefrac{8}{9}}. We'll have to do better than that.
-%
-%  That was text mode. I wonder what happens in math mode?
-%  \begin{verbatim}
-%  \[
-%    \mathbf{ 2 \times \nicefrac{1}{2} }
-%    \times \mathit{2\times \nicefrac{1}{2}}
-%  \]
-%  \end{verbatim}
-%  \[
-%    \mathbf{ 2 \times \nicefrac{1}{2} }
-%    \times \mathit{2\times \nicefrac{1}{2}}
-%  \]
-%  Whoops! Didn't see that coming, did you? I certainly didn't.
-%
-%
-%  This section sounds very much like me tearing the
-%  \package{nicefrac} package apart and well, yes, that's precisely
-%  what I'm doing. It \emph{is} simple and it \emph{does} produce
-%  somewhat acceptable results for Computer Modern, but if we want a
-%  single package for producing such fractions we need a radical new
-%  approach.
-%
-%
-%
-%
-%  \subsection{The Future}
-%
-%  Fonts are wildly different; one macro that works fine for Computer
-%  Modern obviously doesn't work well at all in Palatino. For one we
-%  have to make the separator symbol configurable, and we need to
-%  take care of several details as well: font scaling of the
-%  numerator/denominator pair (ND), font selection of ND etc. If we
-%  are to have a single package for this in the future\footnote{As
-%  this is intended to be about the future, the \package{xfrac} package
-%  requires the \eTeX{} extensions.} we have to define a totally
-%  generic interface for the fraction commands and then adjust
-%  parameters depending on the current font. What you see in this
-%  prototype implementation of \package{xfrac} is just that.
-%
-%
-%  \section{The User Interface}
-%
-%  The \package{xfrac} package defines a document command \cs{sfrac}
-%  with the following syntax:
-%  \begin{quote}
-%  \cs{sfrac}\oarg{instance}\marg{num}\oarg{sep}\marg{denom}
-%  \end{quote}
-%  Lets show a few examples:
-%  \begin{verbatim}
-%  \sfrac{1}{2},  $\sfrac{1}{2}$,
-%  $\mathbf{3\times\sfrac{1}{2}}$
-%  \quad \fontfamily{ppl}\selectfont Palatino: \sfrac{1}{2}
-%  \quad \fontfamily{ptm}\selectfont Times: \sfrac{1}{2}
-%  \end{verbatim}
-%  \begin{quote}
-%  \sfrac{1}{2},  $\sfrac{1}{2}$, $\mathbf{3\times\sfrac{1}{2}}$
-%  \quad \fontfamily{ppl}\selectfont Palatino: \sfrac{1}{2}
-%  \quad \fontfamily{ptm}\selectfont Times: \sfrac{1}{2}
-%  \end{quote}
-%  You'll notice something interesting: Not only does the \cs{sfrac}
-%  command work as it should in math mode, it also gets the job done
-%  for other fonts as well.
-%
-%  \subsection{Text mode}
-%
-%  The usual problem in text mode has a name: Computer Modern. The
-%  solidi of all the Computer Modern fonts leave a lot to be desired,
-%  although things are potentially looking better as the Latin Modern
-%  fonts are becoming more stable and widespread. As long as the
-%  default fonts are Computer Modern variants we must however work
-%  around this. One idea that comes to mind is to see what happens
-%  when you use a solidus from another font instead. Lets try with
-%  Times:
-%  \begin{quote}
-%  \DeclareInstance{xfrac}{cmr2}{text}{
-%    slash-symbol-font = ptm,
-%  }
-%  ``You take \sfrac[cmr2]{1}{2} cup of sugar, \ldots''
-%  \end{quote}
-%  That looks quite good actually, so it was probably very difficult
-%  to obtain that result. Nope, it was extremely easy---if you happen
-%  to know about \emph{instances}:
-%  \begin{verbatim}
-%  \DeclareInstance{xfrac}{cmr}{text}{
-%    slash-symbol-font = ptm,
-%  }
-%  \end{verbatim}
-%  So we define an instance with the name `cmr' from the template
-%  `text' which in turn is of template type `xfrac'. You'll notice
-%  the `cmr' is also the name of the font family for Computer Modern
-%  Roman and the reasoning behind is that every font family should
-%  have it's own settings, and if a document command is to work well
-%  in that scheme, letting it use the name of the current font family
-%  seems like a good idea. Thus the \cs{sfrac} command checks to see
-%  whether an instance with same name as the current font family
-%  exists and uses it if the test is true; otherwise the default
-%  setting is used. Here we defined the instance to be used for the
-%  font family `cmr' and just told it to use the Times font for
-%  typesetting the slash symbol which turns out to be a solidus by
-%  default.
-%
-%  The option \texttt{cm-recommended} which is loaded by default uses
-%  the Times solidus for Computer Modern Roman and Computer Modern
-%  Sans Serif and the Palatino solidus for Computer Modern Typewriter
-%  Type. This looks quite good. Should you however not want this you
-%  can use the option \texttt{cm-standard} which produces somewhat
-%  acceptable results using Computer Modern exclusively.
-%
-%  So what about old style figures? If you use the \package{eco}
-%  package you might define an instance similar to this (`cmor' is
-%  the name of the roman font activated by \package{eco}):
-%   \DeclareInstance{xfrac}{cmor}{text}{
-%    slash-symbol-font = ptm,
-%    numerator-font    = cmr,
-%    denominator-font  = cmr,
-%  }
-%  \begin{verbatim}
-%  \DeclareInstance{xfrac}{cmor}{text}{
-%    slash-symbol-font = ptm,
-%    numerator-font    = cmr,
-%    denominator-font  = cmr,
-%  }
-%  \end{verbatim}
-%  We also use regular Computer Modern Roman for typesetting ND, so
-%  we end up with \switch{cmor}{\sfrac{1}{2}} and
-%  \switch{cmor}{\sfrac{8}{9}} instead of
-%  \switch{cmor}{\nicefrac{1}{2}} and \switch{cmor}{\nicefrac{8}{9}}.
-%  Much better.
-%
-%  There are also situations where other tricks are useful. If you
-%  don't have the inferior and superior figures available in a font,
-%  or the font doesn't have a wider design for small font sizes, you
-%  can cheat by manually scaling the ND-pair. I got nice results for
-%  Adobe's Stempel Garamond (with small caps and old style figures)
-%  with the following setup:
-%  \begin{verbatim}
-%  \DeclareInstance{xfrac}{pegj}{text}{
-%    numerator-font   = pegx,
-%    denominator-font = pegx,
-%    scale-factor     = .9,
-%    h-scale          = 1.1,
-%  }
-%  \end{verbatim}
-%  We use the font family `pegx' (Stempel Garamond with real small
-%  caps) for typesetting the ND-pair. Additionally the key
-%  \key{scale-factor} specifies that the font size used for the
-%  ND-pair should be $0.9$ of the height of the solidus, and the key
-%  \key{h-scale} specifies that the ND-pair should be scaled an extra
-%  10\% horizontally.
-%
-%  Should you be so fortunate the have a font with inferior and
-%  superior figures like in the Monotype Janson example from Philipp
-%  Lehman's excellent \emph{The Font Installation Guide}. In that
-%  example Philipp defines the font families `mjn0' for the inferior
-%  figures and `mjn1' for the superior. Thus to get the \cs{sfrac}
-%  command to use them on the fly for the font family `mjnj' (Janson,
-%  old style figures) we would say
-%  \begin{verbatim}
-%  \DeclareInstance{xfrac}{mjnj}{text}{
-%    numerator-font      = mjn1,
-%    denominator-font    = mjn0,
-%    scaling             = false,
-%    numerator-bot-sep   = 0pt,
-%    denominator-bot-sep = 0pt,
-%  }
-%  \end{verbatim}
-%  I think this example is a very clean way to do it. An alternative
-%  approach could be to use the keys \key{numerator-format} and
-%  \key{denominator-format} to process the arguments and let them
-%  determine what to do.
-%
-%  As a side note Harald Harders was so kind to test it, and it
-%  \emph{does} actually work---I hadn't tested it myself.
-%
-%  \subsection{Math Mode}
-%
-%  In math mode the choices are a lot fewer because first of all
-%  \TeX{} comes with a built-in limitation of 16 math families.
-%  Additionally we will not need a solidus for typesetting split
-%  fractions in math, as tradition is to use a virgule instead. We
-%  define the basic `mathdefault' instance to simply use the math
-%  family in use when the instance is run. So if we're in normal math
-%  like |$\sfrac{7}{9}$| we simply get family~$-1$. If we're inside a
-%  \cs{mathbf} we're in family~$4$ (in the standard setup at least),
-%  and so the fraction is typeset with the same math family. Simple,
-%  isn't?
-%
-%  You can also declare instances for the math families, but I really
-%  don't see why you would. If you do then name them according to the
-%  scheme `mathfam\meta{N}', where \meta{N} is the family number, and
-%  only do it if you \emph{really} know how to set up math fonts.
-%  That is, if \cs{DeclareMathAlphabet} is unbeknownst to you, then
-%  just don't go there.
-%
-%
-%  Another example: If we want \cs{sfrac} to produce split fractions
-%  without doing anything at all, we can choose the collection
-%  `plainmath', which is defined as
-%  \begin{verbatim}
-%  \DeclareCollectionInstance{plainmath}{xfrac}{mathdefault}{math}{
-%    denominator-bot-sep = 0pt,
-%    numerator-bot-sep   = 0pt,
-%    numerator-top-sep   = \maxdimen,
-%    scaling             = false,
-%    slash-right-mkern   = 0mu,
-%    slash-left-mkern    = 0mu,
-%  }
-%  \end{verbatim}
-%  This creates an alternative version of the instance `mathdefault'
-%  with settings as specified by the keys. In the default math setup
-%  \key{numerator-top-sep} is set to 0~pt, and here we set
-%  \key{numerator-bot-sep} to 0~pt as well, so in order to avoid
-%  over-specification (and an error message) we must set
-%  \key{numerator-top-sep} to \cs{maxdimen}. We activate (obeying
-%  normal scoping rules) it with:
-%  \begin{verbatim}
-%  \UseCollection{xfrac}{plainmath}
-%  \end{verbatim}
-%  Then |$\sfrac{8}{13}$| produces\begingroup
-%    \UseCollection{xfrac}{plainmath}
-%    $\sfrac{8}{13}$ and just typing |$8/13$| gives the same result:
-%    $8/13$.
-%  \endgroup
-%
-%
-%  \section{The Template Interface}
-%
-%  \begin{TemplateInterfaceDescription}{xfrac}
-%
-%  \TemplateArgument{1}
-%      {The numerator}
-%
-%  \TemplateArgument{2}
-%       {The separator}
-%
-%   \TemplateArgument{3}
-%      {The denominator}
-%
-%  \TemplateSemantics
-%
-%  Typesets arguments 1 and 3 separated by argument 2, which in text
-%  mode by default is a \emph{solidus}. This is taken from
-%  \package{textcomp} where it is denoted \cs{textfractionsolidus}.
-%  This is the character used for the ready made split level
-%  fractions such as \textonehalf---except in the (European) Computer
-%  Modern fonts. In math mode a \emph{virgule} is used instead as
-%  this is more appropriate and it is always available in the math
-%  fonts. The solidus is a text symbol only.
-%
-%  \end{TemplateInterfaceDescription}
-%
-%  \begin{TemplateDescription}{xfrac}{text}
-%
-%  \TemplateKey{numerator-font}{n}
-%    {Font family specification to use for the numerator.}
-%    {\cs{f@family}}
-%
-%  \TemplateKey{numerator-format}{f1}
-%    {Action to be taken on the numerator.}
-%    {Process argument unchanged}
-%
-%  \TemplateKey{slash-symbol}{n}
-%    {The separator symbol. If not specified the default value will be
-%    used instead.}
-%    {Solidus (\cs{textfractionsolidus})}
-%
-%  \TemplateKey{slash-symbol-font}{n}
-%    {Font family specification to use for the separator symbol.}
-%    {\cs{f@family}}
-%
-%  \TemplateKey{slash-symbol-format}{f1}
-%    {Action to be taken on the separator symbol.}
-%    {Process argument unchanged}
-%
-%  \TemplateKey{denominator-font}{n}
-%    {Font family specification to use for the denominator.}
-%    {\cs{f@family}}
-%
-%  \TemplateKey{denominator-format}{f1}
-%    {Action to be taken on the denominator.}
-%    {Process argument unchanged}
-%
-%  \TemplateKey{h-scale}{n}
-%    {Factor by which the numerator and denominator should be
-%    horizontally scaled. It should only be used if the real superior
-%    and inferior fonts are not available. For instance Stempel
-%    Garamond looks excellent if scaled 10\% extra horizontally, i.e.,
-%    by a factor of 1.1.}
-%    {1}
-%
-%  \TemplateKey{v-scale}{n}
-%    {Same as \key{h-scale} only vertically. Probably not of much use
-%    but added for completetion.}
-%    {1}
-%
-%  \TemplateKey{scale-factor}{n}
-%    {Fraction of the size of \key{slash-symbol}. Used for setting the
-%    font size of numerator and denominator. Usually a value of app.\
-%    \sfrac{5}{6} produces fine results. It should only be used if the
-%    real superior and inferior fonts are not available. As an example
-%    Stempel Garamond looks better if the factor is 0.9.}
-%    {0.83333}
-%
-%  \TemplateKey{scale-relative}{s}
-%    {If set to `true' the font size of the numerator and denominator
-%    is scaled with respect to the height of the \key{slash-symbol}. If
-%    set to `false' the font is scaled with respect to the total height
-%    of the \key{slash-symbol}.}
-%    {true}
-%
-%  \TemplateKey{scaling}{s}
-%    {If set to `true' the fonts are allowed to scale. If set to
-%    `false' they are not. See the `Janson' example for an application.}
-%    {true}
-%
-%  \TemplateKey{numerator-top-sep}{L}
-%    {Dimension specifying the space between the top of the
-%    \key{slash-symbol} and the top of the numerator. If not specified,
-%    the depth of the solidus will be used, because this value will
-%    make the fraction look even.}
-%    {Unspecified}
-%
-%  \TemplateKey{numerator-bot-sep}{L}
-%    {Dimension specifying the lift of the numerator from the
-%    baseline.}
-%    {Unspecified}
-%
-%  \TemplateKey{denominator-bot-sep}{L}
-%    {Dimension specifying the lift of the denominator from the
-%    baseline.}
-%    {Unspecified}
-%
-%  \TemplateKey{slash-right-kern}{L}
-%    {Dimension specifying the kerning between the \key{slash-symbol}
-%    and the numerator. If specified in terms of font specific
-%    dimensions such as \texttt{em} it is better to use
-%    \cs{DelayEvaluation}.}
-%    {\texttt{0pt}}
-%
-%  \TemplateKey{slash-left-kern}{L}
-%    {Dimension specifying the kerning between the \key{slash-symbol}
-%    and the denominator. If specified in terms of font specific
-%    dimensions such as \texttt{em} it is better to use
-%    \cs{DelayEvaluation}.}
-%    {\texttt{0pt}}
-%
-%  \TemplateKey{math-mode}{s}
-%    {Are we in math mode or not?}
-%    {false}
-%
-%  \TemplateKey{phantom}{n}
-%    {A character that suits the common cases. As we would mostly want
-%    to use numbers in text mode we choose a `tall' number, while in
-%    math it is somewhat different.}
-%    {8}
-%
-%  \TemplateSemantics
-%
-%  This template is also the foundation for the `math' template. The
-%  keys \key{slash-right-mkern} and \key{slash-left-mkern} can only
-%  be used in math mode and are not shown here.
-%
-%  \end{TemplateDescription}
-%
-%
-%  \begin{TemplateDescription}{xfrac}{math}
-%
-%  \TemplateKey{numerator-font}{n}
-%    {Font family specification to use for the numerator.}
-%    {\cs{number}\cs{fam}}
-%
-%  \TemplateKey{slash-symbol}{n}
-%    {The separator symbol. If not specified the default value will be
-%    used instead.}
-%    {Virgule ($/$)}
-%
-%  \TemplateKey{slash-symbol-font}{n}
-%    {Font family specification to use for the separator symbol.}
-%    {\cs{number}\cs{fam}}
-%
-%  \TemplateKey{denominator-font}{n}
-%    {Font family specification to use for the denominator.}
-%    {\cs{number}\cs{fam}}
-%
-%  \TemplateKey{scale-factor}{n}
-%    {Fraction of the size of \key{slash-symbol}. In math mode we
-%    cannot rely on the fonts to be able to scale, but giving a default
-%    scale of 0.7 fits into the regular size changing scheme---the
-%    default scheme has values $(D,T,S,SS)=(1,1,0.7,0.5)$ whereas we
-%    with a default \key{scale-factor} of 0.7 get $(1,1,0.7,0.49)$.
-%    That's close enough.}
-%    {0.7}
-%
-%  \TemplateKey{scale-relative}{s}
-%    {If set to `true' the font size of the numerator and denominator
-%    is scaled with respect to the height of the \key{slash-symbol}. If
-%    set to `false' the font is scaled with respect to the total height
-%    of the \key{slash-symbol}.}
-%    {false}
-%
-%  \TemplateKey{scaling}{s}
-%    {If set to `true' the fonts are allowed to scale. If set to
-%    `false' they are not. See the `plainmath' example for an application.}
-%    {true}
-%
-%  \TemplateKey{numerator-top-sep}{L}
-%    {Dimension specifying the space between the top of the
-%    \key{slash-symbol} and the top of the numerator. If not specified,
-%    the depth of the virgule will be used, because this value will
-%    make the fraction look even.}
-%    {\texttt{0pt}}
-%
-%  \TemplateKey{denominator-bot-sep}{L}
-%    {Dimension specifying the lift of the denominator from the
-%    baseline.}
-%    {\texttt{0pt}}
-%
-%  \TemplateKey{slash-right-mkern}{n}
-%    {Same as \key{slash-right-kern} but for math mode only and should
-%    be specified in \texttt{mu} units. This is because \package{calc}
-%    can't use mu-expressions.}
-%    {\texttt{-2mu}}
-%
-%  \TemplateKey{slash-left-mkern}{n}
-%    {Same as \key{slash-left-kern} but for math mode only and should
-%    be specified in \texttt{mu} units. This is because \package{calc}
-%    can't use mu-expressions.}
-%    {\texttt{-1mu}}
-%
-%  \TemplateKey{math-mode}{s}
-%    {Are we in math mode or not?}
-%    {true}
-%
-%  \TemplateKey{phantom}{n}
-%    {A character that suits the common cases. In math we have a high
-%    risk of using a parenthesis, so we choose that. Text mode is
-%    another story.}
-%    {(}
-%
-%  \TemplateSemantics
-%
-%  This template is a restricted version of the `text' template. Only
-%  the keys that are different from the `text' template are shown
-%  here. Also bear in mind that the attributes \key{slash-left-kern}
-%  and \key{slash-right-kern} have no meaning in this template.
-%
-%  \end{TemplateDescription}
-%
-%
-%
-%  \StopEventually{}
-%
-%  \section{Implementation}
-%
-%  We set up the programming interface. We need the
-%  \package{template} and \package{xparse} packages from the
-%  experimental code, more precisely from the `xbase' bundle. The
-%  other packages are well-known.
-%    \begin{macrocode}
-\RequirePackage{textcomp,graphicx,amstext}
-\RequirePackage{template}[2001/07/25]
-\RequirePackage{xparse}[2000/01/29]
-%    \end{macrocode}
-%  \changes{v0.10b}{2004/04/07}{Now uses \cs{InternalSyntaxOn}} With
-%  v0.10b I introduced the new internal syntax using |_| and |:|.
-%  White space is ignored as well, so any |@|-signs in the code are
-%  remnants of old \LaTeX{} coding conventions.
-%    \begin{macrocode}
-\InternalSyntaxOn
-%    \end{macrocode}
-%  Some programming tools which will probably be included in the
-%  \LaTeX3 API.
-%    \begin{macrocode}
-\@ifundefined{else:}{\let\else:=\else}{}
-\@ifundefined{fi:}{\let\fi:=\fi}{}
-\@ifundefined{if_dim:w}{\let\if_dim:w =\ifdim}{}
-\@ifundefined{if_mathmode:}{\let\if_mathmode: =\ifmmode}{}
-\def\xfrac_namelet:cN #1#2{%
-  \expandafter\let\csname#1\endcsname#2}
-%    \end{macrocode}
-%  Boolean data type. No error checking!
-%    \begin{macrocode}
-\def\xfrac_new_boolean:c #1{
-  \expandafter\@ifdefinable\csname if_boolean_#1:\endcsname{
-    \@namedef{boolean_#1_true:}
-      {\xfrac_namelet:cN{if_boolean_#1:}\iftrue}%
-    \@namedef{boolean_#1_false:}
-      {\xfrac_namelet:cN{if_boolean_#1:}\iffalse}%
-    \@nameuse{boolean_#1_false:}%
-  }
-}
-\def\xfrac_set_boolean:cc #1#2{ \@nameuse{boolean_#1_#2:}}
-\def\if_boolean:cTF #1{
-  \@nameuse{if_boolean_#1:}
-    \expandafter\@firstoftwo
-  \else:
-    \expandafter\@secondoftwo
-  \fi:
-}
-\def\if_boolean:cT #1#2{ \if_boolean:cTF {#1}{#2}{} }
-\def\if_boolean:cF #1#2{ \if_boolean:cTF {#1}{}{#2} }
-%    \end{macrocode}
-%
-%  An option:
-%    \begin{macrocode}
-\xfrac_new_boolean:c {cm_recommended}
-\DeclareOption{cm-recommended}
-              { \xfrac_set_boolean:cc {cm_recommended}{true} }
-\DeclareOption{cm-standard}
-              { \xfrac_set_boolean:cc {cm_recommended}{false} }
-\ExecuteOptions{cm-recommended}
-\ProcessOptions\relax
-%    \end{macrocode}
-%
-%  \begin{macro}{\l_xfrac_temp_box}
-%  \begin{macro}{\l_xfrac_slash_box}
-%  We use two box registers. We could probably get away with using
-%  scratch boxes, but this feels safer. Anyway we're all using
-%  \eTeX{} now so why not?
-%    \begin{macrocode}
-\newsavebox\l_xfrac_temp_box
-\newsavebox\l_xfrac_slash_box
-%    \end{macrocode}
-%  \end{macro}
-%  \end{macro}
-%
-%  \subsection{The Templates}
-%  Then we declare the template.
-%    \begin{macrocode}
-\DeclareTemplateType{xfrac}{3}
-%    \end{macrocode}
-%  The template type `text'.
-%    \begin{macrocode}
-\DeclareTemplate{xfrac}{text}{3}{
-  numerator-font      = n  [\f@family]  \xfrac_numeratorfont:,
-  numerator-format    = f1 [#1]         \xfrac_numeratorformat:n,
-  slash-symbol        = n  [\textfractionsolidus]
-                                        \xfrac_slashsymbol:,
-  slash-symbol-font   = n  [\f@family]  \xfrac_slashsymbolfont:,
-  slash-symbol-format = f1 [#1]         \xfrac_slashsymbolformat:n,
-  denominator-font    = n  [\f@family]  \xfrac_denominatorfont:,
-  denominator-format  = f1 [#1]         \xfrac_denominatorformat:n,
-  h-scale             = n  [1]          \xfrac_hscale:,
-  v-scale             = n  [1]          \xfrac_vscale:,
-  scale-factor        = n  [.83333]     \xfrac_scalefactor:,
-  scale-relative      = s  [true]
-    { \def \xfrac_relscale: {\ht\l_xfrac_slash_box}}
-    { \def \xfrac_relscale: {
-      \dimexpr \ht\l_xfrac_temp_box + \dp\l_xfrac_temp_box\relax} },
-  scaling             = s  [true]
-    {\def\xfrac_fontscale: {
-       \fontsize{\xfrac_scalefactor: \xfrac_relscale:}{\z@}\selectfont}}
-    { \let\xfrac_fontscale: \relax },
-%    \end{macrocode}
-%  Here comes some fake lengths. I've decided to call them with the
-%  suffix |_fdim|, so that I will remember to use them right.
-%    \begin{macrocode}
-  numerator-top-sep   = L  [\maxdimen]  \l_xfrac_numeratortopsep_fdim,
-  numerator-bot-sep   = L  [\maxdimen]  \l_xfrac_numeratorbotsep_fdim,
-  denominator-bot-sep = L  [\maxdimen]  \l_xfrac_denominatorbotsep_fdim,
-  slash-right-kern    = L  [0pt]        \l_xfrac_slashrightsep_fdim,
-  slash-left-kern     = L  [0pt]        \l_xfrac_slashleftsep_fdim,
-%    \end{macrocode}
-%  As calc can't handle |\muskip|s, I've made them of type `n' and
-%  added the suffix |_fmu| to indicate `fake mu skip'.
-%    \begin{macrocode}
-  slash-right-mkern   = n  [-2mu]       \l_xfrac_slashrightmsep_fmu,
-  slash-left-mkern    = n  [-1mu]       \l_xfrac_slashleftmsep_fmu,
-  math-mode           = s  [false] { \let\xfrac_math: \ensuremath }
-                                   { \let\xfrac_math: \@firstofone },
-  phantom             = n  [8]          \xfrac_phantom:,
-}{
-  \DoParameterAssignments
-  \if_mathmode:
-    \let\xfrac_textormath: \text
-    \edef\xfrac_slashfontchange: {\fam\xfrac_slashsymbolfont: }
-    \edef\xfrac_numeratorfontchange: {\fam\xfrac_numeratorfont: }
-    \edef\xfrac_denominatorfontchange: {\fam\xfrac_denominatorfont: }
-  \else:
-    \let\xfrac_textormath: \mbox
-    \def\xfrac_slashfontchange: {
-      \fontfamily{\xfrac_slashsymbolfont: }\selectfont}
-    \def\xfrac_numeratorfontchange: {
-      \fontfamily{\xfrac_numeratorfont: }\selectfont}
-    \def\xfrac_denominatorfontchange: {
-      \fontfamily{\xfrac_denominatorfont: }\selectfont}
-  \fi:
-  \xfrac_textormath: {
-%    \end{macrocode}
-%  \changes{v0.11a}{2004/08/24}{Added \cs{m@th}}
-%    \begin{macrocode}
-    \m@th
-    \sbox\l_xfrac_temp_box {\xfrac_math: {\vphantom{(}}}
-    \sbox\l_xfrac_slash_box {
-      \xfrac_math: {
-        \xfrac_slashsymbolformat:n {
-          \xfrac_math: {
-            \xfrac_slashfontchange:
-              \IfValueTF{#2}{#2}{\xfrac_slashsymbol: }
-          }
-        }
-      }
-    }
-    \if_dim:w \l_xfrac_numeratortopsep_fdim = \maxdimen
-      \if_dim:w \l_xfrac_numeratorbotsep_fdim = \maxdimen
-%    \end{macrocode}
-%  Both unspecified.
-%    \begin{macrocode}
-        \def\xfrac_next: {\raisebox{\ht\l_xfrac_slash_box
-                                  -\dp\l_xfrac_slash_box-\height}}
-      \else:
-%    \end{macrocode}
-%  Use only bottom specification.
-%    \begin{macrocode}
-        \def\xfrac_next: {\raisebox{\l_xfrac_numeratorbotsep_fdim }}
-      \fi:
-    \else:
-%    \end{macrocode}
-%  Use only top specification.
-%    \begin{macrocode}
-      \if_dim:w \l_xfrac_numeratorbotsep_fdim = \maxdimen
-        \def\xfrac_next: {
-          \raisebox{
-            \ht\l_xfrac_slash_box - \l_xfrac_numeratortopsep_fdim
-            - \height
-          }
-        }
-      \else:
-%    \end{macrocode}
-%  Over-specification.
-%    \begin{macrocode}
-        \PackageError{xfrac}
-          {You~ have~ specified~ both~ numerator-top-sep~ and~
-          numerator-bot-sep}
-          {I~ will~ pretend~ you~ didn't~ specify~ any~ of ~them}
-        \def\xfrac_next: {\raisebox{\ht\l_xfrac_slash_box
-                                  -\dp\l_xfrac_slash_box-\height}}
-      \fi:
-    \fi:
-%    \end{macrocode}
-%  Typeset the numerator
-%    \begin{macrocode}
-    \xfrac_next: {
-      \xfrac_fontscale:
-      \xfrac_numeratorformat:n {
-        \scalebox{\xfrac_hscale: }[\xfrac_vscale: ]
-          { \xfrac_math:{ \xfrac_numeratorfontchange:
-                          {\vphantom{\xfrac_phantom: }#1} } }
-      }
-    }
-    \xfrac_math: {
-      \if_mathmode:
-        \mskip \l_xfrac_slashrightmsep_fmu
-      \else:
-        \hskip \l_xfrac_slashrightsep_fdim
-      \fi: }
-%    \end{macrocode}
-%  Typeset the separator
-%    \begin{macrocode}
-    \usebox\l_xfrac_slash_box
-    \xfrac_math: {
-      \if_mathmode:
-        \mskip \l_xfrac_slashleftmsep_fmu
-      \else:
-        \hskip \l_xfrac_slashleftsep_fdim
-      \fi: }
-%    \end{macrocode}
-%  Typeset the denominator
-%    \begin{macrocode}
-    \if_dim:w \l_xfrac_denominatorbotsep_fdim=\maxdimen\relax
-      \def\xfrac_next: {\raisebox{-\dp\l_xfrac_slash_box}}
-    \else:
-      \def\xfrac_next: {\raisebox{\l_xfrac_denominatorbotsep_fdim}}
-    \fi:
-    \xfrac_next: {
-      \xfrac_fontscale:
-      \xfrac_denominatorformat:n {
-        \scalebox{\xfrac_hscale:}[\xfrac_vscale:]
-          { \xfrac_math: { \xfrac_denominatorfontchange:
-                          {\vphantom{\xfrac_phantom: }#3} } }
-      }
-    }
-  }
-}
-%    \end{macrocode}
-%
-%  Since math and text mode are wildly different entities we define a
-%  separate template for each. You already saw the `text' template,
-%  and here is the `math' template.
-%    \begin{macrocode}
-\DeclareRestrictedTemplate{xfrac}{math}{text}{
-  numerator-font      = \number\fam,
-  slash-symbol        = /,
-  slash-symbol-font   = \number\fam,
-  denominator-font    = \number\fam,
-  scale-factor        = 0.7,
-  scale-relative      = false,
-  scaling             = true,
-  numerator-top-sep   = 0pt,
-  denominator-bot-sep = 0pt,
-  math-mode           = true,
-  phantom             = (,
-}
-%    \end{macrocode}
-%
-%  \subsection{The Default Instances}
-%
-%  For the default instances we just use the relevant templates with
-%  the default settings.
-%
-%  The default `text' instance.
-%    \begin{macrocode}
-\DeclareInstance{xfrac}{default}{text}{ }
-%    \end{macrocode}
-%  The default `math' instance.
-%    \begin{macrocode}
-\DeclareInstance{xfrac}{mathdefault}{math}{ }
-%    \end{macrocode}
-%    \begin{macrocode}
-\DeclareCollectionInstance{plainmath}{xfrac}{mathdefault}{math}{
-  denominator-bot-sep=0pt,
-  numerator-bot-sep=0pt,
-  numerator-top-sep=\maxdimen,
-  scale-factor = 1,
-  scale-relative = false,
-  scaling = true,
-  slash-right-mkern=0mu,
-  slash-left-mkern=0mu,
-}
-%    \end{macrocode}
-%  Default Computer Modern setup. Far from optimal, but better than
-%  nothing.
-%    \begin{macrocode}
-\DeclareInstance{xfrac}{cmr}{text}{
-  denominator-bot-sep=0pt,
-  numerator-top-sep=\DelayEvaluation{.2ex},
-  slash-left-kern=\DelayEvaluation{-.1em},
-  slash-right-kern=\DelayEvaluation{-.1em},
-}
-\DeclareInstance{xfrac}{cmss}{text}{
-  denominator-bot-sep=0pt,
-  numerator-top-sep=\DelayEvaluation{.2ex},
-  slash-left-kern=\DelayEvaluation{-.1em},
-  slash-right-kern=\DelayEvaluation{-.1em},
-}
-\DeclareInstance{xfrac}{cmtt}{text}{
-  denominator-bot-sep=0pt,
-  numerator-top-sep=\DelayEvaluation{.2ex},
-  slash-left-kern=\DelayEvaluation{-.1em},
-  slash-right-kern=\DelayEvaluation{-.1em},
-}
-%    \end{macrocode}
-%  We can do better for the Computer Modern fonts. For the roman
-%  family we choose Times.
-%    \begin{macrocode}
-\DeclareCollectionInstance{cm-recommended}{xfrac}{cmr}{text}{
-  slash-symbol-font   = ptm,
-}
-%    \end{macrocode}
-%  Times also blends well with `cmss'.
-%    \begin{macrocode}
-\DeclareCollectionInstance{cm-recommended}{xfrac}{cmss}{text}{
-  slash-symbol-font   = ptm,
-}
-%    \end{macrocode}
-%  For `cmtt' we choose the Palatino solidus as it is slightly
-%  thicker than Times.
-%    \begin{macrocode}
-\DeclareCollectionInstance{cm-recommended}{xfrac}{cmtt}{text}{
-  slash-symbol-font   = ppl,
-}
-%    \end{macrocode}
-%  If we used the \texttt{cm-recommended} setup we activate it.
-%    \begin{macrocode}
-\if_boolean:cT {cm_recommended}
-               {\UseCollection{xfrac}{cm-recommended}}
-%    \end{macrocode}
-%
-%  \subsection{The User Command}
-%
-%  Currently there is just a single user command. \cs{sfrac} takes
-%  two mandatory arguments: numerator and denominator. It can take an
-%  optional argument between the mandatory specifying the separator
-%  like this:
-%  \begin{verbatim}
-%    \sfrac{7}[/]{12}
-%  \end{verbatim}
-%  It also has an optional argument that comes before the first
-%  mandatory argument. If used it will use that instance instead of
-%  the auto-detected one, so a user who has defined the instance
-%  `cmr2' may use
-%  \begin{verbatim}
-%    \sfrac[cmr2]{7}{12}
-%  \end{verbatim}
-%  and get the settings from `cmr2' instead of the settings of the
-%  current font family.
-%    \begin{macrocode}
-\DeclareDocumentCommand \sfrac {o mom}{
-  \if_mathmode:
-    \edef\xfrac_next: {mathfam\number\fam}
-    \IfExistsInstanceTF{xfrac}{\xfrac_next: }
-    {\UseInstance{xfrac}{\xfrac_next: }}
-    {\UseInstance{xfrac}{mathdefault}}
-    {#2}{#3}{#4}
-  \else:
-    \IfExistsInstanceTF{xfrac}{#1}
-    {\UseInstance{xfrac}{#1}{#2}{#3}{#4}}
-    {\IfExistsInstanceTF{xfrac}{\f@family}
-      {\UseInstance{xfrac}{\f@family}}
-      {\UseInstance{xfrac}{default}}
-        {#2}{#3}{#4}
-    }
-  \fi:
-}
-%    \end{macrocode}
-%
-% \Finale
-\endinput
diff --git a/Master/texmf-dist/source/latex/xfrac/xfrac.ins b/Master/texmf-dist/source/latex/xfrac/xfrac.ins
deleted file mode 100644
index 430932b4263..00000000000
--- a/Master/texmf-dist/source/latex/xfrac/xfrac.ins
+++ /dev/null
@@ -1,55 +0,0 @@
-%%
-%% This file will generate fast loadable files and documentation
-%% driver files from the doc files in this package when run through
-%% LaTeX or TeX.
-%%
-%% File `xfrac.ins'.
-%% Copyright 2004 Morten H\o gholm.
-%% moho01ab@student.cbs.dk
-%%
-%% It 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
-%% and version 1.3 or later is part of all distributions of LaTeX
-%% version 2003/12/01 or later.
-%%
-%% This work has the LPPL maintenance status "maintained".
-%%
-%% The Current Maintainer of this work is Morten H\o gholm.
-%%
-%% This work consists of the files xfrac.dtx, xfrac.ins and the
-%% derived file xfrac.sty.
-%%
-%% --------------- start of docstrip commands ------------------
-%%
-\input docstrip
-
-\keepsilent
-
-\preamble
-
-It 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
-and version 1.3 or later is part of all distributions of LaTeX
-version 2003/12/01 or later.
-
-This work has the LPPL maintenance status "maintained".
-
-The Current Maintainer of this work is Morten H\string\o gholm.
-
-This work consists of the files xfrac.dtx, xfrac.ins and the
-derived file xfrac.sty.
-
-\endpreamble
-
-%%%%%%%%%%%%%%%
-\generate{%
-  \file{xfrac.sty}{\from{xfrac.dtx}{package}}%
-}
-
-\endbatchfile