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+% \iffalse meta-comment
+%
+% File: grfext.dtx
+% Version: 2019/12/03 v1.3
+% Info: Manage graphics extensions
+%
+% Copyright (C)
+% 2007, 2010 Heiko Oberdiek
+% 2016-2019 Oberdiek Package Support Group
+% https://github.com/ho-tex/grfext/issues
+%
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either
+% version 1.3c of this license or (at your option) any later
+% version. This version of this license is in
+% https://www.latex-project.org/lppl/lppl-1-3c.txt
+% and the latest version of this license is in
+% https://www.latex-project.org/lppl.txt
+% and version 1.3 or later is part of all distributions of
+% LaTeX version 2005/12/01 or later.
+%
+% This work has the LPPL maintenance status "maintained".
+%
+% The Current Maintainers of this work are
+% Heiko Oberdiek and the Oberdiek Package Support Group
+% https://github.com/ho-tex/grfext/issues
+%
+% This work consists of the main source file grfext.dtx
+% and the derived files
+% grfext.sty, grfext.pdf, grfext.ins, grfext.drv,
+%
+% Distribution:
+% CTAN:macros/latex/contrib/grfext/grfext.dtx
+% CTAN:macros/latex/contrib/grfext/grfext.pdf
+%
+% Unpacking:
+% (a) If grfext.ins is present:
+% tex grfext.ins
+% (b) Without grfext.ins:
+% tex grfext.dtx
+% (c) If you insist on using LaTeX
+% latex \let\install=y\input{grfext.dtx}
+% (quote the arguments according to the demands of your shell)
+%
+% Documentation:
+% (a) If grfext.drv is present:
+% latex grfext.drv
+% (b) Without grfext.drv:
+% latex grfext.dtx; ...
+% The class ltxdoc loads the configuration file ltxdoc.cfg
+% if available. Here you can specify further options, e.g.
+% use A4 as paper format:
+% \PassOptionsToClass{a4paper}{article}
+%
+% Programm calls to get the documentation (example):
+% pdflatex grfext.dtx
+% makeindex -s gind.ist grfext.idx
+% pdflatex grfext.dtx
+% makeindex -s gind.ist grfext.idx
+% pdflatex grfext.dtx
+%
+% Installation:
+% TDS:tex/latex/grfext/grfext.sty
+% TDS:doc/latex/grfext/grfext.pdf
+% TDS:source/latex/grfext/grfext.dtx
+%
+%<*ignore>
+\begingroup
+ \catcode123=1 %
+ \catcode125=2 %
+ \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: grfext 2019/12/03 v1.3 Manage graphics extensions (HO)}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+This is a generated file.
+
+Project: grfext
+Version: 2019/12/03 v1.3
+
+Copyright (C)
+ 2007, 2010 Heiko Oberdiek
+ 2016-2019 Oberdiek Package Support Group
+
+This work may be distributed and/or modified under the
+conditions of the LaTeX Project Public License, either
+version 1.3c of this license or (at your option) any later
+version. This version of this license is in
+ https://www.latex-project.org/lppl/lppl-1-3c.txt
+and the latest version of this license is in
+ https://www.latex-project.org/lppl.txt
+and version 1.3 or later is part of all distributions of
+LaTeX version 2005/12/01 or later.
+
+This work has the LPPL maintenance status "maintained".
+
+The Current Maintainers of this work are
+Heiko Oberdiek and the Oberdiek Package Support Group
+https://github.com/ho-tex/grfext/issues
+
+
+This work consists of the main source file grfext.dtx
+and the derived files
+ grfext.sty, grfext.pdf, grfext.ins, grfext.drv.
+
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+
+\generate{%
+ \file{grfext.ins}{\from{grfext.dtx}{install}}%
+ \file{grfext.drv}{\from{grfext.dtx}{driver}}%
+ \usedir{tex/latex/grfext}%
+ \file{grfext.sty}{\from{grfext.dtx}{package}}%
+% \usedir{doc/latex/grfext/test}%
+% \file{grfext-test1.tex}{\from{grfext.dtx}{test1}}%
+% \file{grfext-test2.tex}{\from{grfext.dtx}{test2}}%
+}
+
+\catcode32=13\relax% active space
+\let =\space%
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{* grfext.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `grfext.drv'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+%</install>
+%<*ignore>
+\fi
+%</ignore>
+%<*driver>
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesFile{grfext.drv}%
+ [2019/12/03 v1.3 Manage graphics extensions (HO)]%
+\documentclass{ltxdoc}
+\usepackage{holtxdoc}[2011/11/22]
+\begin{document}
+ \DocInput{grfext.dtx}%
+\end{document}
+%</driver>
+% \fi
+%
+%
+%
+% \GetFileInfo{grfext.drv}
+%
+% \title{The \xpackage{grfext} package}
+% \date{2019/12/03 v1.3}
+% \author{Heiko Oberdiek\thanks
+% {Please report any issues at \url{https://github.com/ho-tex/grfext/issues}}}
+%
+% \maketitle
+%
+% \begin{abstract}
+% This package provides macros for adding and reordering
+% graphics extensions of package \xpackage{graphics}.
+% \end{abstract}
+%
+% \tableofcontents
+%
+% \section{Documentation}
+%
+% \subsection{Introduction}
+%
+% If you are not familiar with \LaTeX's graphics bundle, please
+% read its documentation \xfile{grffile} \cite{graphics}.
+% The bundle contains two packages for graphics inclusion:
+% \xpackage{graphics} and \xpackage{graphicx}. The first one
+% is loaded by the second one that adds a key value interface.
+%
+% Graphics files are included in both cases by macro
+% \cs{includegraphics}. The file name extension can be omitted.
+% Then the graphics package goes through a list of known
+% extensions until it finds the graphics file. This extension list
+% is set by \cs{DeclareGraphicsExtensions}. The previous contents
+% of the list is overwritten.
+%
+% \subsection{User interface}
+%
+% This package \xpackage{grfext} provides macros that adds entries
+% to the list or remove them. The list may be empty or even
+% undefined before. It is always defined afterwards, but can
+% be empty (especially after removing entries).
+%
+% \begin{declcs}{AppendGraphicsExtensions} * \M{ext-list}\\
+% \cs{PrependGraphicsExtensions} * \M{ext-list}
+% \end{declcs}
+% The argument \meta{ext-list} is a comma separated list whose
+% entries are file name extensions including the dot.
+% But first the entries are removed from
+% \xpackage{graphics}' extension list to avoid multiple
+% occurences of the same extension.
+%
+% Then macro \cs{AppendGraphicsExtensions} adds the entries
+% after the end of \xpackage{graphics}' list, whereas
+% macro \cs{PrependGraphicsExtensions} puts them in front
+% of the list.
+% The order matters if a graphics file is available in
+% different acceptable formats. Then the first extension
+% wins.
+%
+% The star version of these commands only adds an extensions,
+% if a specific graphics rule exists for that extension.
+%
+% \begin{declcs}{RemoveGraphicsExtensions} \M{ext-list}
+% \end{declcs}
+% All occurences of file extensions in \meta{ext-list} are
+% removed from \xpackage{graphics}' extension list.
+%
+% \subsection{Package loading}
+%
+% The package does not define any options. It is loaded
+% as usual in \LaTeX, e.g.:
+% \begin{quote}
+% |\usepackage{grfext}|
+% \end{quote}
+%
+% \begin{declcs}{PrintGraphicsExtensions}
+% \end{declcs}
+% Macro \cs{PrintGraphicsExtensions} writes the current
+% graphics extensions list in the \xfile{.log} file.
+% The macros described before do this automatically
+% after their operation.
+%
+% \subsection{Option support for package \xpackage{graphicx}}
+%
+% Package \xpackage{graphicx} uses the interface of package
+% \xpackage{keyval} in order to specify options for
+% \cs{includegraphics}. The options can also be set using
+% \begin{quote}
+% |\setkeys{Gin}{|\meta{options}|}|
+% \end{quote}
+% The four user macros with the two star forms are available
+% as options in family |Gin| as well:
+% \begin{quote}
+% |AppendGraphicsExtensions={|\meta{ext-list}|}|\\
+% |AppendGraphicsExtensions*={|\meta{ext-list}|}|\\
+% |PrependGraphicsExtensions={|\meta{ext-list}|}|\\
+% |PrependGraphicsExtensions*{|\meta{ext-list}|}|\\
+% |RemoveGraphicsExtensions={|\meta{ext-list}|}|\\
+% |PrintGraphicsExtensions|
+% \end{quote}
+% This makes it easier to locally change the extension list
+% for an included graphics, e.g.:
+% \begin{quote}
+% |\includegraphics[RemoveGraphicsExtensions={.pdf,PDF}]{image}|
+% \end{quote}
+%
+% \subsection{\plainTeX}
+%
+% \LaTeX's graphics packages can also be used with \plainTeX.
+% The necessary basic \LaTeX\ macros are defined in
+% \xfile{miniltx.tex}. This package \xpackage{grfext} also
+% relies on it. Example:
+%\begin{quote}
+%\begin{verbatim}
+%\input miniltx.tex\relax
+%\def\Gin@driver{pdftex.def}
+%\input graphicx.sty\relax
+%\input grfext.sty\relax
+%\resetatcatcode
+%\end{verbatim}
+%\end{quote}
+%
+% \StopEventually{
+% }
+%
+% \section{Implementation}
+%
+% \begin{macrocode}
+%<*package>
+% \end{macrocode}
+%
+% \subsection{Relead check and identification}
+% Reload check, especially if the package is not used with \LaTeX.
+% \begin{macrocode}
+\begingroup\catcode61\catcode48\catcode32=10\relax%
+ \catcode13=5 % ^^M
+ \endlinechar=13 %
+ \catcode35=6 % #
+ \catcode39=12 % '
+ \catcode44=12 % ,
+ \catcode45=12 % -
+ \catcode46=12 % .
+ \catcode58=12 % :
+ \catcode64=11 % @
+ \catcode123=1 % {
+ \catcode125=2 % }
+ \expandafter\let\expandafter\x\csname ver@grfext.sty\endcsname
+ \ifx\x\relax % plain-TeX, first loading
+ \else
+ \def\empty{}%
+ \ifx\x\empty % LaTeX, first loading,
+ % variable is initialized, but \ProvidesPackage not yet seen
+ \else
+ \expandafter\ifx\csname PackageInfo\endcsname\relax
+ \def\x#1#2{%
+ \immediate\write-1{Package #1 Info: #2.}%
+ }%
+ \else
+ \def\x#1#2{\PackageInfo{#1}{#2, stopped}}%
+ \fi
+ \x{grfext}{The package is already loaded}%
+ \aftergroup\endinput
+ \fi
+ \fi
+\endgroup%
+% \end{macrocode}
+% Package identification:
+% \begin{macrocode}
+\begingroup\catcode61\catcode48\catcode32=10\relax%
+ \catcode13=5 % ^^M
+ \endlinechar=13 %
+ \catcode35=6 % #
+ \catcode39=12 % '
+ \catcode40=12 % (
+ \catcode41=12 % )
+ \catcode44=12 % ,
+ \catcode45=12 % -
+ \catcode46=12 % .
+ \catcode47=12 % /
+ \catcode58=12 % :
+ \catcode64=11 % @
+ \catcode91=12 % [
+ \catcode93=12 % ]
+ \catcode123=1 % {
+ \catcode125=2 % }
+ \expandafter\ifx\csname ProvidesPackage\endcsname\relax
+ \def\x#1#2#3[#4]{\endgroup
+ \immediate\write-1{Package: #3 #4}%
+ \xdef#1{#4}%
+ }%
+ \else
+ \def\x#1#2[#3]{\endgroup
+ #2[{#3}]%
+ \ifx#1\@undefined
+ \xdef#1{#3}%
+ \fi
+ \ifx#1\relax
+ \xdef#1{#3}%
+ \fi
+ }%
+ \fi
+\expandafter\x\csname ver@grfext.sty\endcsname
+\ProvidesPackage{grfext}%
+ [2019/12/03 v1.3 Manage graphics extensions (HO)]%
+% \end{macrocode}
+%
+% \subsection{Catcodes}
+%
+% \begin{macrocode}
+\begingroup\catcode61\catcode48\catcode32=10\relax%
+ \catcode13=5 % ^^M
+ \endlinechar=13 %
+ \catcode123=1 % {
+ \catcode125=2 % }
+ \catcode64=11 % @
+ \def\x{\endgroup
+ \expandafter\edef\csname grfext@AtEnd\endcsname{%
+ \endlinechar=\the\endlinechar\relax
+ \catcode13=\the\catcode13\relax
+ \catcode32=\the\catcode32\relax
+ \catcode35=\the\catcode35\relax
+ \catcode61=\the\catcode61\relax
+ \catcode64=\the\catcode64\relax
+ \catcode123=\the\catcode123\relax
+ \catcode125=\the\catcode125\relax
+ }%
+ }%
+\x\catcode61\catcode48\catcode32=10\relax%
+\catcode13=5 % ^^M
+\endlinechar=13 %
+\catcode35=6 % #
+\catcode64=11 % @
+\catcode123=1 % {
+\catcode125=2 % }
+\def\TMP@EnsureCode#1#2{%
+ \edef\grfext@AtEnd{%
+ \grfext@AtEnd
+ \catcode#1=\the\catcode#1\relax
+ }%
+ \catcode#1=#2\relax
+}
+\TMP@EnsureCode{42}{12}% *
+\TMP@EnsureCode{44}{12}% ,
+\TMP@EnsureCode{47}{12}% /
+\TMP@EnsureCode{58}{12}% :
+\TMP@EnsureCode{60}{12}% <
+\TMP@EnsureCode{62}{12}% >
+\TMP@EnsureCode{91}{12}% [
+\TMP@EnsureCode{93}{12}% ]
+\edef\grfext@AtEnd{\grfext@AtEnd\noexpand\endinput}
+% \end{macrocode}
+%
+% \subsection{\plainTeX}
+%
+% \begin{macro}{\@expandtwoargs}
+% Requirement is \xfile{miniltx.tex}, but we need also
+% \LaTeX's \cs{@expandtwoargs}.
+% \begin{macrocode}
+\@ifundefined{@expandtwoargs}{%
+ \def\@expandtwoargs#1#2#3{%
+ \edef\reserved@a{\noexpand#1{#2}{#3}}%
+ \reserved@a
+ }%
+}{}
+% \end{macrocode}
+% \end{macro}
+%
+% \subsection{Add}
+%
+% \begin{macro}{\AppendGraphicsExtensions}
+% \begin{macrocode}
+\newcommand*{\AppendGraphicsExtensions}{%
+ \@ifundefined{Gin@extensions}{%
+ \let\Gin@extensions\@empty
+ }{}%
+ \@ifstar{\grfext@Append\grfext@Check}{\grfext@Append\grfext@@Add}%
+}%
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\grfext@Append}
+% \begin{macrocode}
+\def\grfext@Append#1#2{%
+ \let\grfext@Print\@gobble
+ \edef\grfext@next{%
+ \noexpand\grfext@Add\noexpand#1{%
+ \zap@space#2 \@empty
+ }{\noexpand\Gin@extensions,}{}%
+ }%
+ \grfext@next
+ \let\grfext@Print\grfext@@Print
+ \grfext@Print\AppendGraphicsExtensions
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\PrependGraphicsExtensions}
+% \begin{macrocode}
+\newcommand*{\PrependGraphicsExtensions}{%
+ \@ifundefined{Gin@extensions}{%
+ \let\Gin@extensions\@empty
+ }{}%
+ \@ifstar{\grfext@Prepend\grfext@Check}{\grfext@Prepend\grfext@@Add}%
+}%
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\grfext@Prepend}
+% \begin{macrocode}
+\def\grfext@Prepend#1#2{%
+ \let\grfext@Print\@gobble
+ \edef\grfext@next{%
+ \noexpand\grfext@Add\noexpand#1{%
+ \zap@space#2 \@empty
+ }{}{,\noexpand\Gin@extensions}%
+ }%
+ \grfext@next
+ \let\grfext@Print\grfext@@Print
+ \grfext@Print\PrependGraphicsExtensions
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\grfext@Add}
+% \begin{macrocode}
+\def\grfext@Add#1#2{%
+ #1{#2}%
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\grfext@@Add}
+% \begin{macrocode}
+\def\grfext@@Add#1#2#3{%
+ \RemoveGraphicsExtensions{#1}%
+ \ifx\Gin@extensions\@empty
+ \def\Gin@extensions{#1}%
+ \else
+ \edef\Gin@extensions{#2#1#3}%
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \subsection{Check}
+%
+% \begin{macro}{\grfext@Check}
+% \begin{macrocode}
+\def\grfext@Check#1{%
+ \let\grfext@tmp\@empty
+ \@for\grfext@ext:=#1\do{%
+ \@ifundefined{Gin@rule@\grfext@ext}{%
+ }{%
+ \ifx\grfext@tmp\@empty
+ \let\grfext@tmp\grfext@ext
+ \else
+ \edef\grfext@tmp{\grfext@tmp,\grfext@ext}%
+ \fi
+ }%
+ }%
+ \ifx\grfext@tmp\@empty
+ \def\grfext@next##1##2{}%
+ \else
+ \edef\grfext@next{%
+ \noexpand\grfext@@Add{\grfext@tmp}%
+ }%
+ \fi
+ \grfext@next
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \subsection{Remove}
+%
+% \begin{macro}{\RemoveGraphicsExtensions}
+% \begin{macrocode}
+\newcommand*{\RemoveGraphicsExtensions}[1]{%
+ \@ifundefined{Gin@extensions}{%
+ \def\Gin@extensions{}%
+ }{%
+ \edef\grfext@tmp{\zap@space#1 \@empty}%
+ \@for\grfext@ext:=\grfext@tmp\do{%
+ \def\grfext@next{%
+ \let\grfext@tmp\Gin@extensions
+ \@expandtwoargs
+ \@removeelement\grfext@ext\Gin@extensions\Gin@extensions
+ \ifx\grfext@tmp\Gin@extensions
+ \let\grfext@next\relax
+ \fi
+ \grfext@next
+ }%
+ \grfext@next
+ }%
+ }%
+ \grfext@Print\RemoveGraphicsExtensions
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \subsection{Print}
+%
+% \begin{macrocode}
+\RequirePackage{infwarerr}[2007/09/09]
+% \end{macrocode}
+%
+% \begin{macro}{\PrintGraphicsExtensions}
+% \begin{macrocode}
+\def\PrintGraphicsExtensions{%
+ \grfext@Print\PrintGraphicsExtensions
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\grfext@Print}
+% \begin{macrocode}
+\def\grfext@Print#1{%
+ \@PackageInfo{grfext}{%
+ Graphics extension search list:\MessageBreak
+ \@ifundefined{Gin@extensions}{%
+ <unavailable>%
+ }{%
+ [\Gin@extensions]%
+ }\MessageBreak
+ \string#1%
+ }%
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\grfext@@Print}
+% \begin{macrocode}
+\let\grfext@@Print\grfext@Print
+% \end{macrocode}
+% \end{macro}
+%
+% \subsection{Defining options for package \xpackage{graphicx}}
+%
+% \begin{macrocode}
+\RequirePackage{kvdefinekeys}[2010/03/01]
+\kv@define@key{Gin}{AppendGraphicsExtensions}{%
+ \AppendGraphicsExtensions{#1}%
+}
+\kv@define@key{Gin}{AppendGraphicsExtensions*}{%
+ \AppendGraphicsExtensions*{#1}%
+}
+\kv@define@key{Gin}{PrependGraphicsExtensions}{%
+ \PrependGraphicsExtensions{#1}%
+}
+\kv@define@key{Gin}{PrependGraphicsExtensions*}{%
+ \PrependGraphicsExtensions*{#1}%
+}
+\kv@define@key{Gin}{RemoveGraphicsExtensions}{%
+ \RemoveGraphicsExtensions{#1}%
+}
+\kv@define@key{Gin}{PrintGraphicsExtensions}[]{%
+ \PrintGraphicsExtensions
+}
+% \end{macrocode}
+%
+% \begin{macrocode}
+\grfext@AtEnd%
+%</package>
+% \end{macrocode}
+% \section{Installation}
+%
+% \subsection{Download}
+%
+% \paragraph{Package.} This package is available on
+% CTAN\footnote{\CTANpkg{grfext}}:
+% \begin{description}
+% \item[\CTAN{macros/latex/contrib/grfext/grfext.dtx}] The source file.
+% \item[\CTAN{macros/latex/contrib/grfext/grfext.pdf}] Documentation.
+% \end{description}
+%
+%
+% \paragraph{Bundle.} All the packages of the bundle `grfext'
+% are also available in a TDS compliant ZIP archive. There
+% the packages are already unpacked and the documentation files
+% are generated. The files and directories obey the TDS standard.
+% \begin{description}
+% \item[\CTANinstall{install/macros/latex/contrib/grfext.tds.zip}]
+% \end{description}
+% \emph{TDS} refers to the standard ``A Directory Structure
+% for \TeX\ Files'' (\CTANpkg{tds}). Directories
+% with \xfile{texmf} in their name are usually organized this way.
+%
+% \subsection{Bundle installation}
+%
+% \paragraph{Unpacking.} Unpack the \xfile{grfext.tds.zip} in the
+% TDS tree (also known as \xfile{texmf} tree) of your choice.
+% Example (linux):
+% \begin{quote}
+% |unzip grfext.tds.zip -d ~/texmf|
+% \end{quote}
+%
+% \subsection{Package installation}
+%
+% \paragraph{Unpacking.} The \xfile{.dtx} file is a self-extracting
+% \docstrip\ archive. The files are extracted by running the
+% \xfile{.dtx} through \plainTeX:
+% \begin{quote}
+% \verb|tex grfext.dtx|
+% \end{quote}
+%
+% \paragraph{TDS.} Now the different files must be moved into
+% the different directories in your installation TDS tree
+% (also known as \xfile{texmf} tree):
+% \begin{quote}
+% \def\t{^^A
+% \begin{tabular}{@{}>{\ttfamily}l@{ $\rightarrow$ }>{\ttfamily}l@{}}
+% grfext.sty & tex/latex/grfext/grfext.sty\\
+% grfext.pdf & doc/latex/grfext/grfext.pdf\\
+% grfext.dtx & source/latex/grfext/grfext.dtx\\
+% \end{tabular}^^A
+% }^^A
+% \sbox0{\t}^^A
+% \ifdim\wd0>\linewidth
+% \begingroup
+% \advance\linewidth by\leftmargin
+% \advance\linewidth by\rightmargin
+% \edef\x{\endgroup
+% \def\noexpand\lw{\the\linewidth}^^A
+% }\x
+% \def\lwbox{^^A
+% \leavevmode
+% \hbox to \linewidth{^^A
+% \kern-\leftmargin\relax
+% \hss
+% \usebox0
+% \hss
+% \kern-\rightmargin\relax
+% }^^A
+% }^^A
+% \ifdim\wd0>\lw
+% \sbox0{\small\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\footnotesize\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\scriptsize\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\tiny\t}^^A
+% \ifdim\wd0>\linewidth
+% \lwbox
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \end{quote}
+% If you have a \xfile{docstrip.cfg} that configures and enables \docstrip's
+% TDS installing feature, then some files can already be in the right
+% place, see the documentation of \docstrip.
+%
+% \subsection{Refresh file name databases}
+%
+% If your \TeX~distribution
+% (\TeX\,Live, \mikTeX, \dots) relies on file name databases, you must refresh
+% these. For example, \TeX\,Live\ users run \verb|texhash| or
+% \verb|mktexlsr|.
+%
+% \subsection{Some details for the interested}
+%
+% \paragraph{Unpacking with \LaTeX.}
+% The \xfile{.dtx} chooses its action depending on the format:
+% \begin{description}
+% \item[\plainTeX:] Run \docstrip\ and extract the files.
+% \item[\LaTeX:] Generate the documentation.
+% \end{description}
+% If you insist on using \LaTeX\ for \docstrip\ (really,
+% \docstrip\ does not need \LaTeX), then inform the autodetect routine
+% about your intention:
+% \begin{quote}
+% \verb|latex \let\install=y\input{grfext.dtx}|
+% \end{quote}
+% Do not forget to quote the argument according to the demands
+% of your shell.
+%
+% \paragraph{Generating the documentation.}
+% You can use both the \xfile{.dtx} or the \xfile{.drv} to generate
+% the documentation. The process can be configured by the
+% configuration file \xfile{ltxdoc.cfg}. For instance, put this
+% line into this file, if you want to have A4 as paper format:
+% \begin{quote}
+% \verb|\PassOptionsToClass{a4paper}{article}|
+% \end{quote}
+% An example follows how to generate the
+% documentation with pdf\LaTeX:
+% \begin{quote}
+%\begin{verbatim}
+%pdflatex grfext.dtx
+%makeindex -s gind.ist grfext.idx
+%pdflatex grfext.dtx
+%makeindex -s gind.ist grfext.idx
+%pdflatex grfext.dtx
+%\end{verbatim}
+% \end{quote}
+%
+% \begin{thebibliography}{9}
+%
+% \bibitem{graphics}
+% David Carlisle, Sebastian Rahtz: \textit{The \xpackage{graphics} package};
+% 2006/02/20 v1.0o;
+% \CTAN{macros/latex/required/graphics/graphics.dtx}.
+%
+% \end{thebibliography}
+%
+% \begin{History}
+% \begin{Version}{2007/09/30 v1.0}
+% \item
+% First public version.
+% \end{Version}
+% \begin{Version}{2010/08/19 v1.1}
+% \item
+% User macros are also made available as keyval options for
+% package \xpackage{graphicx}.
+% \end{Version}
+% \begin{Version}{2016/05/16 v1.2}
+% \item
+% Documentation updates.
+% \end{Version}
+% \begin{Version}{2019/12/03 v1.3}
+% \item
+% Documentation updates.
+% \end{Version}
+% \end{History}
+%
+% \PrintIndex
+%
+% \Finale
+\endinput