%%
%% The LaTeX Companion, 3ed
%%
%% Example 4-2-53 on page I-328 in "listings --- Pretty-printing program code".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It 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.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.0pt}

%StartShownPreambleCommands
\usepackage{listings}
\lstset{language=bash,upquote,commentstyle=\tiny}
%StopShownPreambleCommands

\begin{document}
  \begin{lstlisting}[columns=fixed]
  cat `kpsewhich bm.sty` # package
  texdoc bm              # doc/code
  \end{lstlisting}
  \begin{lstlisting}[columns={[l]flexible}]
  cat `kpsewhich bm.sty` # package is where?
  texdoc bm              # display doc/code
  \end{lstlisting}
  \begin{lstlisting}[columns=fullflexible]
  cat `kpsewhich bm.sty` # package is where?
  texdoc bm              # display doc/code
  \end{lstlisting}
\end{document}
