%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 3-4-18 on page 160.
%%
%% 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{183.0pt}
\def\thechapter{3}
\StartShownPreambleCommands
\usepackage{fancyvrb}
\renewcommand\theFancyVerbLine{\footnotesize
  \thechapter.\arabic{FancyVerbLine}}
\StopShownPreambleCommands
\begin{document}
\begin{Verbatim}[numbers=left,stepnumber=2,
                 numberblanklines=true]
Normally empty lines in
in a verbatim will not receive
numbers---here they do!

Admittedly using stepnumber
with such a redefinition of
FancyVerbLine looks a bit odd.
\end{Verbatim}
\end{document}