1\@ifundefined{verbatim@processline}{\input verbatim.sty}{} 2 3\newwrite \isaverbatim@out 4\def\openisaverbatimout#1{\immediate\openout \isaverbatim@out #1} 5\def\closeisaverbatimout{\immediate\closeout \isaverbatim@out} 6\def\isaverbatimwrite{% 7 \@bsphack 8 \let\do\@makeother\dospecials 9 \catcode`\^^M\active \catcode`\^^I=12 10 \def\verbatim@processline{% 11 \immediate\write\isaverbatim@out 12 {\the\verbatim@line}}% 13 \verbatim@start} 14 15\def\endisaverbatimwrite{% 16 \@esphack} 17