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+%%
+%% The LaTeX Companion, 2ed (second printing August 2004)
+%%
+%% Example 3-3-27 on page 149.
+%%
+%% 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}
+\sloppy %as the column in the book is so small
+\StartShownPreambleCommands
+\usepackage{calc}
+\newenvironment{altDescription}[1]
+ {\begin{list}{}%
+ {\renewcommand\makelabel[1]{\textsf{##1:}\hfil}%
+ \settowidth\labelwidth{\makelabel{#1}}%
+ \setlength\leftmargin{\labelwidth+\labelsep}}}%
+ {\end{list}}
+\StopShownPreambleCommands
+\begin{document}
+\begin{altDescription}{Return values}
+\item[Description]
+ Returns from a function. If issued at top level,
+ the interpreter simply terminates, just as if end
+ of input had been reached.
+\item[Errors]
+ None.
+\item[Return values]
+ Any arguments in effect are passed back to the
+ caller.
+\end{altDescription}
+\end{document}