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%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 2-1-1 on page 21.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%% Johannes Braams, David Carlisle, and Chris Rowley
%%
%% 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.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%
\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.0pt}
\StartShownPreambleCommands
\usepackage[code]{optional}
\StopShownPreambleCommands
\begin{document}
\opt{doc}{Typeset this if option doc was declared.}
\opt{code}{Typeset this if option code was declared.}
\opt{doc,code}{Typeset this for either doc or code.}
Typeset this always. \opt{}{and this never!}
\opt{doc}{\input{examples}}
\end{document}
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