Sub Articulo 168.0
* L'environnement narrow, de K. Reckdahl, ci-dessous permet
d'encapsuler des paragraphes de largeurs différentes.
%%%% debut macro %%%%
%-----------------------------------------------------------------
% \begin{narrow}{1.0in}{0.5in} produces text which is narrowed
% by 1.0 on left margin and 0.5 inches on right margin
% \begin{narrow}{-1.0in}{-0.5in} produces text which is widened
% by 1.0 on left margin and 0.5 inches on right margin
% Narrow environments can be nested and are ended by \end{narrow}
%-----------------------------------------------------------------
\newenvironment{narrow}[2]{%
\begin{list}{}{%
\setlength{\topsep}{0pt}%
\setlength{\leftmargin}{#1}%
\setlength{\rightmargin}{#2}%
\setlength{\listparindent}{\parindent}%
\setlength{\itemindent}{\parindent}%
\setlength{\parsep}{\parskip}%
}%
\item[]}{\end{list}}
%%%% fin macro %%%%