%%
%% The LaTeX Companion, 3ed
%%
%% Example 4-2-32 on page I-316 in "Limiting the displayed data".
%%
%% 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{87.0pt}

%StartShownPreambleCommands
\usepackage{fancyvrb,color}
%StopShownPreambleCommands

\begin{document}
\newenvironment{example}
  {\VerbatimEnvironment\begin{VerbatimOut}{test.out}}
  {\end{VerbatimOut}\noindent
   \BVerbatimInput[lastline=1,formatcom=\color{blue}]{test.out}%
   \VerbatimInput[numbers=left,firstnumber=1,firstline=2]{test.out}}
\begin{example}
A blue line.
Numbered lines
in black.
\end{example}
\end{document}