%%%% debut macro %%%%
%% -----------------------------------------------
%% Copyright (c) 1993 Hydro-Quebec
%%            mboyer@robot.ireq.ca
%% -----------------------------------------------

%% Bring items closer together in list environments
% Prevent infinite loops
\let\orig@Itemize =\itemize
\let\orig@Enumerate =\enumerate
\let\orig@Description =\description
% Zero the vertical spacing parameters
\def\Nospacing{\itemsep=0pt\topsep=0pt%
               \partopsep=0pt\parskip=0pt%
               \parsep=0pt}
% Redefinition de art12.sty pour commencer a la
% marge de gauche
%\leftmargini 1.2em      % 2.5em

\def\noitemsep{
% Redefine the environments in terms of the original
% values
\renewenvironment{itemize}
  {\orig@Itemize\Nospacing}{\endlist}
\renewenvironment{enumerate}
  {\orig@Enumerate\Nospacing}{\endlist}
\renewenvironment{description}
  {\orig@Description\Nospacing}%
{\endlist}
}

\def\doitemsep{
% Redefine the environments to the original values
\renewenvironment{itemize}
  {\orig@Itemize}{\endlist}
\renewenvironment{enumerate}
  {\orig@Enumerate}{\endlist}
\renewenvironment{description}
  {\orig@Description}{\endlist}
}