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\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{docmute}[2009/10/08 v1.1 Input standalone documents]
\def\docmute@docenv{document}
\long\def\docmute@gobblepreamble#1\begin#2{%
  \def\docmute@thisenv{#2}%
  \ifx\docmute@thisenv\docmute@docenv
    \docmute@afterpreamble
  \else
    \expandafter\docmute@gobblepreamble
  \fi
}
\def\docmute@afterpreamble{%
  \docmute@atbegindoc
  \def\enddocument{%
    \docmute@atenddoc
    \aftergroup\ignorespaces
    \endinput
  }%
  \ignorespaces
}
\let\docmute@document=\document
\let\docmute@enddocument=\enddocument
\let\docmute@atbegindoc=\relax
\def\docmute@atenddoc{%
  \let\enddocument=\docmute@enddocument
  \begingroup
}
\let\docmute=\docmute@gobblepreamble
\def\document{%
  \docmute@document
  \let\documentclass=\docmute
  \ignorespaces
}
\DeclareOption{nested}{%
  \let\docmute@atbegindoc=\begingroup
  \let\docmute@atenddoc=\relax
}
\ProcessOptions