latex3 (30may17)

git-svn-id: svn://tug.org/texlive/trunk@44483 c570f23f-e606-0410-a88d-b1316a301751

30 files changed, 11 insertions, 581 deletions

diff --git a/Master/texmf-dist/doc/latex/l3build/README.md b/Master/texmf-dist/doc/latex/l3build/README.md
index 276675631c1..d05d541855e 100644
--- a/Master/texmf-dist/doc/latex/l3build/README.md
+++ b/Master/texmf-dist/doc/latex/l3build/README.md
@@ -1,7 +1,7 @@
 l3build: a testing and building system for LaTeX3
 =================================================
 
-Release 2017/05/19
+Release 2017/05/29
 
 Overview
 --------
diff --git a/Master/texmf-dist/doc/latex/l3build/l3build.pdf b/Master/texmf-dist/doc/latex/l3build/l3build.pdf
index b3f5835d769..4fe3f17adaa 100644
--- a/Master/texmf-dist/doc/latex/l3build/l3build.pdf
+++ b/Master/texmf-dist/doc/latex/l3build/l3build.pdf
diff --git a/Master/texmf-dist/doc/latex/l3experimental/README.md b/Master/texmf-dist/doc/latex/l3experimental/README.md
index a4fcc33bde8..ccac875f177 100644
--- a/Master/texmf-dist/doc/latex/l3experimental/README.md
+++ b/Master/texmf-dist/doc/latex/l3experimental/README.md
@@ -1,7 +1,7 @@
 Experimental LaTeX3 Concepts
 ============================
 
-Release 2017/05/13
+Release 2017/05/29
 
 Overview
 --------
@@ -32,11 +32,7 @@ A 'string' in TeX terms is a token list in which all of the tokens have
 category code 12 ('other'), with the exception of spaces which have the
 category code 10 ('space'). The `l3str` bundle consists of two parts. The
 first is `l3str` itself. This is a collection of functions to act on strings,
-including for manipulations such as UTF8 mappings in pdfTeX. The second
-part of the bundle is `l3regex`, a regular expression search-and-replace
-implementation written in TeX primitives. The regex module works on token
-lists, and is part of `l3str` (currently) for historical reasons: the team
-anticipate splitting the two in the future.
+including for manipulations such as UTF8 mappings in pdfTeX.
 
 `xcoffins`
 ----------
diff --git a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3intarray.pdf b/Master/texmf-dist/doc/latex/l3experimental/l3str/l3intarray.pdf
deleted file mode 100644
index d636674bc80..00000000000
--- a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3intarray.pdf
+++ /dev/null
diff --git a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3regex.pdf b/Master/texmf-dist/doc/latex/l3experimental/l3str/l3regex.pdf
deleted file mode 100644
index 01cfbdbb127..00000000000
--- a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3regex.pdf
+++ /dev/null
diff --git a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3str-convert.pdf b/Master/texmf-dist/doc/latex/l3experimental/l3str/l3str-convert.pdf
index 187de639968..0ff1e19524b 100644
--- a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3str-convert.pdf
+++ b/Master/texmf-dist/doc/latex/l3experimental/l3str/l3str-convert.pdf
diff --git a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3str-format.pdf b/Master/texmf-dist/doc/latex/l3experimental/l3str/l3str-format.pdf
index 9c72c830baf..a84ed19f4fc 100644
--- a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3str-format.pdf
+++ b/Master/texmf-dist/doc/latex/l3experimental/l3str/l3str-format.pdf
diff --git a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3tl-analysis.pdf b/Master/texmf-dist/doc/latex/l3experimental/l3str/l3tl-analysis.pdf
deleted file mode 100644
index b7035acda05..00000000000
--- a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3tl-analysis.pdf
+++ /dev/null
diff --git a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3tl-build.pdf b/Master/texmf-dist/doc/latex/l3experimental/l3str/l3tl-build.pdf
deleted file mode 100644
index 50c18f66a91..00000000000
--- a/Master/texmf-dist/doc/latex/l3experimental/l3str/l3tl-build.pdf
+++ /dev/null
diff --git a/Master/texmf-dist/doc/latex/l3experimental/xcoffins/xcoffins.pdf b/Master/texmf-dist/doc/latex/l3experimental/xcoffins/xcoffins.pdf
index 59d76b7dd49..b0474719904 100644
--- a/Master/texmf-dist/doc/latex/l3experimental/xcoffins/xcoffins.pdf
+++ b/Master/texmf-dist/doc/latex/l3experimental/xcoffins/xcoffins.pdf
diff --git a/Master/texmf-dist/doc/latex/l3experimental/xgalley/l3galley.pdf b/Master/texmf-dist/doc/latex/l3experimental/xgalley/l3galley.pdf
index 8859730fe8d..4f6675280b8 100644
--- a/Master/texmf-dist/doc/latex/l3experimental/xgalley/l3galley.pdf
+++ b/Master/texmf-dist/doc/latex/l3experimental/xgalley/l3galley.pdf
diff --git a/Master/texmf-dist/doc/latex/l3experimental/xgalley/xgalley.pdf b/Master/texmf-dist/doc/latex/l3experimental/xgalley/xgalley.pdf
index 9768984fbe5..1b9b2c657dc 100644
--- a/Master/texmf-dist/doc/latex/l3experimental/xgalley/xgalley.pdf
+++ b/Master/texmf-dist/doc/latex/l3experimental/xgalley/xgalley.pdf
diff --git a/Master/texmf-dist/doc/latex/l3kernel/README.md b/Master/texmf-dist/doc/latex/l3kernel/README.md
index ec32d80e731..1e941253eee 100644
--- a/Master/texmf-dist/doc/latex/l3kernel/README.md
+++ b/Master/texmf-dist/doc/latex/l3kernel/README.md
@@ -1,7 +1,7 @@
 LaTeX3 Programming Conventions
 ==============================
 
-Release 2017/05/13
+Release 2017/05/29
 
 Overview
 --------
diff --git a/Master/texmf-dist/doc/latex/l3kernel/expl3.pdf b/Master/texmf-dist/doc/latex/l3kernel/expl3.pdf
index 27bba9740e1..374371230f6 100644
--- a/Master/texmf-dist/doc/latex/l3kernel/expl3.pdf
+++ b/Master/texmf-dist/doc/latex/l3kernel/expl3.pdf
diff --git a/Master/texmf-dist/doc/latex/l3kernel/interface3.pdf b/Master/texmf-dist/doc/latex/l3kernel/interface3.pdf
index 3647b2b48f2..18de9660f4d 100644
--- a/Master/texmf-dist/doc/latex/l3kernel/interface3.pdf
+++ b/Master/texmf-dist/doc/latex/l3kernel/interface3.pdf
diff --git a/Master/texmf-dist/doc/latex/l3kernel/interface3.tex b/Master/texmf-dist/doc/latex/l3kernel/interface3.tex
deleted file mode 100644
index 4c0a2761e92..00000000000
--- a/Master/texmf-dist/doc/latex/l3kernel/interface3.tex
+++ /dev/null
@@ -1,89 +0,0 @@
-% \iffalse meta-comment
-%
-%% File: interfaces3.tex Copyright (C) 1990-2011 The LaTeX3 Project
-%%
-%% It may be distributed and/or modified under the conditions of the
-%% LaTeX Project Public License (LPPL), either version 1.3c of this
-%% license or (at your option) any later version.  The latest version
-%% of this license is in the file
-%%
-%%    http://www.latex-project.org/lppl.txt
-%%
-%% This file is part of the "l3kernel bundle" (The Work in LPPL)
-%% and all files in that bundle must be distributed together.
-%%
-%% The released version of this bundle is available from CTAN.
-%%
-%% -----------------------------------------------------------------------
-%%
-%% The development version of the bundle can be found at
-%%
-%%    http://www.latex-project.org/svnroot/experimental/trunk/
-%%
-%% for those people who are interested.
-%%
-%%%%%%%%%%%
-%% NOTE: %%
-%%%%%%%%%%%
-%%
-%%   Snapshots taken from the repository represent work in progress and may
-%%   not work or may contain conflicting material!  We therefore ask
-%%   people _not_ to put them into distributions, archives, etc. without
-%%   prior consultation with the LaTeX3 Project.
-%%
-%% -----------------------------------------------------------------------
-%
-% \fi
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%
-% This document will typeset the LaTeX3 interface descriptions a single
-% document. This will produce quite a large file (more than 170 pages
-% currently).
-%
-% There is also a full version of the sources (source3.tex) which additionally
-% also typesets the command implementations.
-%
-% Do not forget to generate the index (as explained on the terminal output
-% near the end of the run)!
-%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-
-\documentclass{l3doc}
-\listfiles
-
-\begin{document}
-
-\title{The \LaTeX3 Interfaces}
-\author{%
- The \LaTeX3 Project\thanks
-   {%
-     E-mail:
-       \href{mailto:latex-team@latex-project.org}
-         {latex-team@latex-project.org}%
-   }%
-}
-
-\pagenumbering{roman}
-\maketitle
-
-%
-% First load all modules and typeset the documentation parts
-%
-
-\input{source3body}    % all the individual modules
-
-\clearpage
-
-\begingroup
-  \def\endash{--}
-  \catcode`\-\active
-  \def-{\futurelet\temp\indexdash}
-  \def\indexdash{\ifx\temp-\endash\fi}
-  \DelayPrintIndex
-\endgroup
-
-\end{document}
-
-
diff --git a/Master/texmf-dist/doc/latex/l3kernel/l3docstrip.pdf b/Master/texmf-dist/doc/latex/l3kernel/l3docstrip.pdf
index 8bc6bf4fada..0dd679911d9 100644
--- a/Master/texmf-dist/doc/latex/l3kernel/l3docstrip.pdf
+++ b/Master/texmf-dist/doc/latex/l3kernel/l3docstrip.pdf
diff --git a/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.pdf b/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.pdf
index 25a4ac803ea..0a9b12ea552 100644
--- a/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.pdf
+++ b/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.pdf
diff --git a/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.tex b/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.tex
deleted file mode 100644
index 909461fe12f..00000000000
--- a/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.tex
+++ /dev/null
@@ -1,274 +0,0 @@
-\iffalse meta-comment
-
-File l3styleguide.tex Copyright (C) 2011,2012,2015-2017 The LaTeX3 Project
-
-It may be distributed and/or modified under the conditions of the
-LaTeX Project Public License (LPPL), either version 1.3c of this
-license or (at your option) any later version.  The latest version
-of this license is in the file
-
-   http://www.latex-project.org/lppl.txt
-
-This file is part of the "l3kernel bundle" (The Work in LPPL)
-and all files in that bundle must be distributed together.
-
-The released version of this bundle is available from CTAN.
-
-\fi
-
-\documentclass{l3doc}
-
-
-\title{%
-  The \LaTeX3 kernel: style guide for code authors%
-}
-\author{%
-  The \LaTeX3 Project\thanks
-    {%
-      E-mail:
-      \href{mailto:latex-team@latex-project.org}%
-        {latex-team@latex-project.org}%
-    }%
-}
-\date{Released 2017/05/13}
-
-\begin{document}
-
-\maketitle
-
-\tableofcontents
-
-\section{Introduction}
-
-This document is intended as a style guide for authors of code and
-documentation for the \LaTeX3 kernel. It covers both aspects of coding
-style and the formatting of the sources. The aim of providing these
-guidelines is help ensure consistency of the code and sources from
-different authors. Experience suggests that in the long-term this helps
-with maintenance. There will of course be places where there are
-exceptions to these guidelines: common sense should always be
-applied!
-
-\section{Documentation style}
-
-\LaTeX3 source and documentation should be written using the document
-class \cls{l3doc} in \file{dtx} format. This class provides a number
-of logical mark up elements, which should be used where possible.
-In the main, this is standard \LaTeX{} practice, but there are a
-few points to highlight:
-\begin{itemize}
-  \item
-    Where possible, use \cs{cs} to mark up control sequences
-    rather than using a verbatim environment.
-  \item
-    Arguments which are given in braces should be marked using
-    \cs{Arg} when code-level functions are discussed, but using
-    \cs{marg} for document functions.
-  \item
-    The names \TeX{}, \LaTeX{}, \emph{etc}.\ use the normal logical mark
-    up followed by an empty group (|{}|), with the exception of |\LaTeX3|,
-    where the number should follow directly.
-  \item
-    Where in line verbatim text is used, it should be marked up
-    using the \verb=|...|= construct (\emph{i.e.}~vertical bars delimit
-    the verbatim text).
-  \item In line quotes should be marked up using the \cs{enquote}
-    function.
-  \item
-    Where numbers in the source have a mathematical meaning,
-    they should be included in math mode. Such in-line math mode
-    material should be marked up using |$...$| and  \emph{not}
-    |\(...\)|.
-\end{itemize}
-
-Line length in the source files should be under $80$
-characters where possible, as this helps keep everything on the screen
-when editing files. In the \file{dtx} format, documentation lines start
-with a \texttt{\%}, which is usually followed by a space to leave a
-\enquote{comment margin} at the start of each line.
-
-As with code indenting (see later), nested environments and arguments
-should be indented by (at least) two spaces to make the nature of the nesting
-clear. Thus for example a typical arrangement for the \env{function}
-environment might be
-\begin{verbatim*}
-\begin{function}{\seq_gclear:N, \seq_gclear:c}
-  \begin{syntax}
-    \cs{seq_gclear:N} \meta{sequence}
-  \end{syntax}
-  Clears all entries from the \meta{sequence} globally.
-\end{function}
-\end{verbatim*}
-The \enquote{outer} \verb*|% \begin{function}| should have the customary
-space after the |%| character at the start of the line.
-
-In general, a single \env{function}  or \env{macro} environment should be
-used for a group of closely-related functions, for example argument
-specification variants. In such cases, a comma-separated list should be
-used, as shown in the preceding example.
-
-\section{Format of the code itself}
-
-The requirement for less than $80$ characters per line applies to the code
-itself as well as the surrounding documentation. A number of the general
-style principles for \LaTeX3 code apply: these are described in the following
-paragraph and an example is then given.
-
-With the exception of simple runs of parameter (|{#1}|, |#1#2|,
-\emph{etc.}), everything should be divided up using spaces to make the code
-more readable. In general, these will be single spaces, but in some
-places it makes more sense to align parts of the code to emphasise
-similarity. (Tabs should not be used for introducing white space.)
-
-Each conceptually-separate step in a function should be on a separate
-line, to make the meaning clearer. Hence the \texttt{false} branch
-in the example uses two lines for the two auxiliary function uses.
-
-Within the definition, a two-space indent should be used to show each
-\enquote{level} of code. Thus in the example \cs{tl_if_empty:nTF} is
-indented by two spaces, but the two branches are indented by four
-spaces. Within the \texttt{false} branch, the need for multiple lines
-means that an additional two-space indent should be used to show that
-these lines are all part of the brace group.
-
-The result of these lay-out conventions is code which will in general
-look like the example:
-\begin{verbatim*}
-\cs_new:Npn \module_foo:nn #1#2
-  {
-    \tl_if_empty:nTF {#1}
-      { \module_foo_aux:n { X #2 } }
-      {
-        \module_foo_aux:nn {#1} {#2}
-        \module_foo_aux:n { #1 #2 }
-      }
-  }
-\end{verbatim*}
-
-\section{Code conventions}
-
-All code-level functions should be \enquote{long} if they accept any
-arguments, even if it seems \enquote{very unlikely} that a \cs{par} token
-will be passed. Thus \cs{cs_new_nopar:Npn} and so forth should only be used
-to create interfaces at the document level (where trapping \cs{par} tokens
-may be appropriate) or where comparison to other code known not to be
-\enquote{long} is required (\emph{e.g.}~when working with mixed
-\LaTeXe{}/\pkg{expl3} situations).
-
-The expandability of each function should be well-defined. Functions which
-cannot be fully expanded must be \texttt{protected}. This means that expandable
-functions must themselves only contain expandable material. Functions which
-use any non-expandable material must be defined using \cs{cs_new_protected:Npn}
-or similar.
-
-When using \cs{cs_generate_variant:Nn}, group related variants together
-to make the pattern clearer. A common example is variants of a function
-which has an \texttt{N}-type first argument:
-\begin{verbatim}
-  \cs_generate_variant:Nn \foo:Nn {     NV , No }
-  \cs_generate_variant:Nn \foo:Nn { c , cV , co }
-\end{verbatim}
-
-There may be cases where omitting braces from \texttt{o}-type arguments
-is desirable for performance reasons. This should only be done if the
-argument is a single token, thus for example
-\begin{verbatim}
-  \tl_set:No \l_some_tl \l_some_other_tl
-\end{verbatim}
-remains clear and can be used where appropriate.
-
-\section{Private and internal functions}
-
-Private functions (those starting \cs{__}) should not be used between modules.
-The only exception is where a \enquote{family} of modules share some
-\enquote{internal} methods: this happens most obviously in the kernel itself.
-Any internal functions or variables \emph{must} be documented in the same way
-as public ones.
-
-The \pkg{l3docstrip} method should be used for internal functions in a module.
-This requires a line
-\begin{quote}
-  \ttfamily
-  \%<@@=\meta{module}>
-\end{quote}
-at the start of the source (\texttt{.dtx}) file, with internal functions
-then written in the form
-\begin{verbatim}
-  \cs_new_protected:Npn \@@_function:nn #1#2
-    ...
-\end{verbatim}
-
-\subsection{Access from other modules}
-
-There may be cases where it is useful to use an internal function from
-a third-party module (this includes cases where you are the author of both
-but they are not part of the same \enquote{family}). In these cases, you should
-\emph{copy} the definition of the internal function to your code: this avoids
-relying on non-documented interfaces. At the same time, it is strongly
-encouraged that you discuss your requirements with the author of the
-code you need to access. The best long-term solution to these cases is for
-new documented interfaces to be added to the parent module.
-
-\subsection{Access to primitives}
-
-As \pkg{expl3} is still a developing system, there are places where direct
-access to engine primitives is required. These are all marked as
-\enquote{do not use} in the code and so require special handling. Where a
-programmer is sure that they need to use a primitive (for example where the
-team have not yet covered access to an area) then a local copy of the
-primitive should be made, for example
-\begin{verbatim}
-  \cs_new_eq:NN \__module_message:w \tex_message:D
-  % ...
-  \cs_new_protected:Npn \__module_fancy_msg:n #1
-    { \__module_message:w { *** #1 *** } }
-\end{verbatim}
-This approach makes it possible for the team and others to find such
-usage (by searching for the \texttt{:D} argument type) but avoids
-multiple uses in general code.
-
-At the same time, the team ask that these use cases are raised on the
-\texttt{LaTeX-L} mailing list. The team are keen to collect use cases for
-areas that have not yet been addressed and to provide new code where the
-required interfaces become clear.
-
-Programmers using primitives should be ready to make updates to their
-code as the team develop additional interfaces.
-
-\section{Auxiliary functions}
-
-In general, the team encourages the use of descriptive names in \LaTeX3 code.
-Thus many helper functions will have names which describe briefly what they do,
-rather than simply indicating that they are auxiliary to some higher-level
-function. However, there are places where one or more \texttt{aux} functions
-are required. Where possible, these should be differentiated by signature
-\begin{verbatim}
-  \cs_new_protected:Npn \@@_function:nn #1#2
-    {
-      ...
-    }
-  \cs_new_protected:Npn \@@_function_aux:nn #1#2
-    {
-      ...
-    }
-  \cs_new_protected:Npn \@@_function_aux:w #1#2 \q_stop
-    {
-      ...
-    }
-\end{verbatim}
-Where more than one auxiliary shares the same signature, the recommended naming
-scheme is \texttt{auxi}, \texttt{auxii} and so on.
-\begin{verbatim}
-  \cs_new_protected:Npn \@@_function_auxi:nn #1#2
-    {
-      ...
-    }
-  \cs_new_protected:Npn \@@_function_auxii:nn #1#2
-    {
-      ...
-    }
-\end{verbatim}
-The use of \texttt{aux_i}, \texttt{aux_ii}, \emph{etc.}\ is discouraged as this
-conflicts with the convention used by \cs{use_i:nn} and related functions.
-
-\end{document}
diff --git a/Master/texmf-dist/doc/latex/l3kernel/l3syntax-changes.pdf b/Master/texmf-dist/doc/latex/l3kernel/l3syntax-changes.pdf
index 60a0c7a2d4c..878e47efdf5 100644
--- a/Master/texmf-dist/doc/latex/l3kernel/l3syntax-changes.pdf
+++ b/Master/texmf-dist/doc/latex/l3kernel/l3syntax-changes.pdf
diff --git a/Master/texmf-dist/doc/latex/l3kernel/l3syntax-changes.tex b/Master/texmf-dist/doc/latex/l3kernel/l3syntax-changes.tex
deleted file mode 100644
index 5e39806bda2..00000000000
--- a/Master/texmf-dist/doc/latex/l3kernel/l3syntax-changes.tex
+++ /dev/null
@@ -1,101 +0,0 @@
-\iffalse meta-comment
-
-File l3syntax-changes.tex Copyright (C) 2011-2012,2017 The LaTeX3 Project
-
-It may be distributed and/or modified under the conditions of the
-LaTeX Project Public License (LPPL), either version 1.3c of this
-license or (at your option) any later version.  The latest version
-of this license is in the file
-
-   http://www.latex-project.org/lppl.txt
-
-This file is part of the "l3kernel bundle" (The Work in LPPL)
-and all files in that bundle must be distributed together.
-
-The released version of this bundle is available from CTAN.
-
-\fi
-
-\documentclass{l3doc}
-
-
-\title{%
-  Syntax changes in \LaTeX3 functions%
-}
-\author{%
-  The \LaTeX3 Project\thanks
-    {%
-      E-mail:
-      \href{mailto:latex-team@latex-project.org}%
-        {latex-team@latex-project.org}%
-    }%
-}
-\date{Released 2017/05/13}
-
-\newcommand{\TF}{\textit{(TF)}}
-
-\begin{document}
-
-\maketitle
-
-This file lists functions whose syntax has changed after August 2011,
-with an approximate date.
-
-\section{August 2011}
-
-\begin{itemize}
-  \item \cs{tl_if_single:n\TF} recognized any non-zero number of
-    explicit spaces as \meta{true}, and did not ignore trailing spaces.
-    Now it is \meta{true} for
-    \[
-      \meta{optional spaces}
-      \meta{normal token or brace group}
-      \meta{optional spaces}.
-    \]
-  \item \cs{tl_reverse:n} stripped outer braces and lost unprotected spaces.
-    Now it keeps spaces, leaves unbraced single tokens unbraced, and
-    braced groups braced.
-  \item \cs{tl_trim_spaces:n} only removed one leading and trailing space.
-    Now removes recursively. Also, on the left it used to strip implicit
-    and explicit spaces with any character code. Now it strips only explicit
-    space characters $(32,10)$.
-\end{itemize}
-
-\section{September 2011}
-
-\begin{itemize}
-\item clist functions which receive an \texttt{n}-type comma list argument
-  now trim spaces from each item in the argument.
-\end{itemize}
-
-\section{June 2012}
-
-\begin{itemize}
-  \item Access to list functions now indexes from~$1$, not from~$0$.
-  This applies to multiple choices in the \pkg{l3keys} module and
-  the \cs{clist_item:Nn}, \cs{seq_item:Nn} and \cs{tl_item:Nn}
-  functions.
-  \item \cs{tl_trim_spaces:n} now requires a variable number of
-  expansions to fully expand, rather than exactly two.  Of course,
-  \texttt{x}-type expansion still correctly evaluates this function.
-\end{itemize}
-
-\section{July 2012}
-
-\begin{itemize}
-  \item The \cs{tl_if_head_eq_meaning:nN}, \cs{tl_if_head_eq_catcode:nN}
-    and \cs{tl_if_head_eq_charcode:nN} conditionals now never match when
-    their first argument is empty.
-\end{itemize}
-
-\section{August 2012}
-
-\begin{itemize}
-  \item \cs{lua_now:x} is now a standard \texttt{x}-type expansion of
-    \cs{lua_now:n}, which does no expansion. Engine-level expansion is moved
-    to \cs{lua_now_x:n}, reflecting the fact that this is non-standard in the
-    same way as for example \cs{str_if_eq_x:nn(TF)}.
-\end{itemize}
-
-
-\end{document}
diff --git a/Master/texmf-dist/doc/latex/l3kernel/source3.pdf b/Master/texmf-dist/doc/latex/l3kernel/source3.pdf
index a0f086afe40..ac3ebd9ad71 100644
--- a/Master/texmf-dist/doc/latex/l3kernel/source3.pdf
+++ b/Master/texmf-dist/doc/latex/l3kernel/source3.pdf
diff --git a/Master/texmf-dist/doc/latex/l3kernel/source3.tex b/Master/texmf-dist/doc/latex/l3kernel/source3.tex
deleted file mode 100644
index 22c3c44048d..00000000000
--- a/Master/texmf-dist/doc/latex/l3kernel/source3.tex
+++ /dev/null
@@ -1,106 +0,0 @@
-% \iffalse meta-comment
-%
-%% File: source3.tex Copyright (C) 1990-2011 The LaTeX3 Project
-%%
-%% It may be distributed and/or modified under the conditions of the
-%% LaTeX Project Public License (LPPL), either version 1.3c of this
-%% license or (at your option) any later version.  The latest version
-%% of this license is in the file
-%%
-%%    http://www.latex-project.org/lppl.txt
-%%
-%% This file is part of the "l3kernel bundle" (The Work in LPPL)
-%% and all files in that bundle must be distributed together.
-%%
-%% The released version of this bundle is available from CTAN.
-%%
-%% -----------------------------------------------------------------------
-%%
-%% The development version of the bundle can be found at
-%%
-%%    http://www.latex-project.org/svnroot/experimental/trunk/
-%%
-%% for those people who are interested.
-%%
-%%%%%%%%%%%
-%% NOTE: %%
-%%%%%%%%%%%
-%%
-%%   Snapshots taken from the repository represent work in progress and may
-%%   not work or may contain conflicting material!  We therefore ask
-%%   people _not_ to put them into distributions, archives, etc. without
-%%   prior consultation with the LaTeX3 Project.
-%%
-%% -----------------------------------------------------------------------
-%
-% \fi
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%
-% This document will typeset the LaTeX3 sources as a single document.
-% This will produce quite a large file (more than 780 pages).
-%
-% There is also a shorter version (interface3.tex) that only typesets the
-% command % interface descriptions.
-%
-% Do not forget to generate the index (as explained on the terminal output
-% near the end of the run)!
-%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-\documentclass{l3doc}
-\listfiles
-
-\begin{document}
-
-\title{The \LaTeX3 Sources}
-\author{%
- The \LaTeX3 Project\thanks
-   {%
-     E-mail:
-       \href{mailto:latex-team@latex-project.org}
-         {latex-team@latex-project.org}%
-   }%
-}
-
-\pagenumbering{roman}
-\maketitle
-
-%
-% First load all modules and typeset the documentation parts
-%
-
-\input{source3body}    % all the individual modules
-
-%
-% Now reload all modules and typeset the implementation parts
-%
-
-\part{Implementation}
-
-\def\maketitle{}
-\EnableImplementation
-\DisableDocumentation
-\DocInputAgain
-
-\clearpage
-\pagestyle{headings}
-
-% Make TeX shut up.
-\hbadness=10000
-\newcount\hbadness
-\hfuzz=\maxdimen
-
-\PrintChanges
-\clearpage
-
-\begingroup
-  \def\endash{--}
-  \catcode`\-\active
-  \def-{\futurelet\temp\indexdash}
-  \def\indexdash{\ifx\temp-\endash\fi}
-
-  \DelayPrintIndex
-\endgroup
-
-\end{document}
diff --git a/Master/texmf-dist/doc/latex/l3kernel/source3body.tex b/Master/texmf-dist/doc/latex/l3kernel/source3body.tex
index 86203d42ac6..b8f445ec6c8 100644
--- a/Master/texmf-dist/doc/latex/l3kernel/source3body.tex
+++ b/Master/texmf-dist/doc/latex/l3kernel/source3body.tex
@@ -347,8 +347,8 @@ without repetition, this information is given in a shortened form:
     |\sys_if_engine_xetex:TF| \Arg{true code} \Arg{false code}
   \end{syntax}
   The underlining and italic of \texttt{TF} indicates that
-  |\xetex_if_engine:T|, |\xetex_if_engine:F| and
-  |\xetex_if_engine:TF| are all available. Usually, the illustration
+  |\sys_if_engine_xetex:T|, |\sys_if_engine_xetex:F| and
+  |\sys_if_engine_xetex:TF| are all available. Usually, the illustration
   will use the \texttt{TF} variant, and so both \meta{true code}
   and \meta{false code} will be shown. The two variant forms \texttt{T} and
   \texttt{F} take only \meta{true code} and \meta{false code}, respectively.
@@ -419,6 +419,7 @@ used on top of \LaTeXe{} if \cs{outer} tokens are used in the arguments.
 \DocInput{l3str.dtx}
 \DocInput{l3seq.dtx}
 \DocInput{l3int.dtx}
+\DocInput{l3intarray.dtx}
 \DocInput{l3flag.dtx}
 \DocInput{l3quark.dtx}
 \DocInput{l3prg.dtx}
@@ -452,6 +453,9 @@ used on top of \LaTeXe{} if \cs{outer} tokens are used in the arguments.
 \ExplSyntaxOff
 
 \DocInput{l3sort.dtx}
+\DocInput{l3tl-analysis.dtx}
+\DocInput{l3tl-build.dtx}
+\DocInput{l3regex.dtx}
 \DocInput{l3box.dtx}
 \DocInput{l3coffins.dtx}
 \DocInput{l3color.dtx}
diff --git a/Master/texmf-dist/doc/latex/l3packages/README.md b/Master/texmf-dist/doc/latex/l3packages/README.md
index 9fb0ae2bb43..4a157fa5454 100644
--- a/Master/texmf-dist/doc/latex/l3packages/README.md
+++ b/Master/texmf-dist/doc/latex/l3packages/README.md
@@ -1,7 +1,7 @@
 LaTeX3 High-Level Concepts
 ==========================
 
-Release 2017/05/13
+Release 2017/05/29
 
 Overview
 --------
diff --git a/Master/texmf-dist/doc/latex/l3packages/l3keys2e/l3keys2e.pdf b/Master/texmf-dist/doc/latex/l3packages/l3keys2e/l3keys2e.pdf
index acd5b6d2d77..31796912bb4 100644
--- a/Master/texmf-dist/doc/latex/l3packages/l3keys2e/l3keys2e.pdf
+++ b/Master/texmf-dist/doc/latex/l3packages/l3keys2e/l3keys2e.pdf
diff --git a/Master/texmf-dist/doc/latex/l3packages/xfp/xfp.pdf b/Master/texmf-dist/doc/latex/l3packages/xfp/xfp.pdf
index 165ec365d4d..b8f1965546a 100644
--- a/Master/texmf-dist/doc/latex/l3packages/xfp/xfp.pdf
+++ b/Master/texmf-dist/doc/latex/l3packages/xfp/xfp.pdf
diff --git a/Master/texmf-dist/doc/latex/l3packages/xfrac/xfrac.pdf b/Master/texmf-dist/doc/latex/l3packages/xfrac/xfrac.pdf
index d25a5fb1de9..f253fe27bd6 100644
--- a/Master/texmf-dist/doc/latex/l3packages/xfrac/xfrac.pdf
+++ b/Master/texmf-dist/doc/latex/l3packages/xfrac/xfrac.pdf
diff --git a/Master/texmf-dist/doc/latex/l3packages/xparse/xparse.pdf b/Master/texmf-dist/doc/latex/l3packages/xparse/xparse.pdf
index 2eedc21e4e5..ee5762fe637 100644
--- a/Master/texmf-dist/doc/latex/l3packages/xparse/xparse.pdf
+++ b/Master/texmf-dist/doc/latex/l3packages/xparse/xparse.pdf
diff --git a/Master/texmf-dist/doc/latex/l3packages/xtemplate/xtemplate.pdf b/Master/texmf-dist/doc/latex/l3packages/xtemplate/xtemplate.pdf
index ddd3231aadc..d62d369132e 100644
--- a/Master/texmf-dist/doc/latex/l3packages/xtemplate/xtemplate.pdf
+++ b/Master/texmf-dist/doc/latex/l3packages/xtemplate/xtemplate.pdf