% Minimized from latex3/latex2e `base/ltmiscen.dtx` / `base/lttab.dtx` /
% `base/ltfloat.dtx` (smoke-test issue #71). `oldcomments` is ltxdoc's
% comment-like environment for historical LaTeX 2.09 sources; it is defined
% inside a catcode-swapped region in ltxdoc.dtx, where `/` is the escape, so no
% static scan can learn it -- the curated signature database is the only place
% the fact can live. Its body is opaque: unbalanced braces and a bare document
% closer written in prose are data, not structure.
%
% \begin{oldcomments}
% \box\@curfield :=G \hbox { \unhbox\@currfield %%} brace matching
% \begin, \end, and \@checkend changed so \end{document} will catch
% a still-open environment.
% \endarray{NAME} == BEGIN \crcr }} END
% \end{oldcomments}
%
% \begin{macro}{\after}
% \begin{macrocode}
\def\after{ok}
% \end{macrocode}
% \end{macro}