%%
%% The LaTeX Companion, 3ed
%%
%% Example 4-1-29 on page I-277 in "Hooking in 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{117.0pt}

  \addtolength\textwidth{18pt} % manual adjustment for the display in the book

%StartShownPreambleCommands
 \usepackage{ragged2e,enumitem}
 \renewlist{quote}{itemize}{4}
 \setlist[quote]{label=,rightmargin=\leftmargin,
   before=\RaggedRight,first=\item,listparindent=1em}
%StopShownPreambleCommands

\begin{document}
 \noindent \ldots\ some text before.
 \begin{quote}
   Some text in our redefined \texttt{quote} environment. \par
   Paragraphs are indented and the text is set ragged right.
 \end{quote}
 \ldots\ and some text following \ldots
\end{document}
