typical published manuals, so people can more easily see what they're
really asking for.  ;-)

Revise the verbatim environment: simple implementation, but more
compatible if a document also add \usepackage{verbatim} at the
beginning.

Declare \modindex, \bimodindex, \exmodindex, and \stmodindex
obsolete.  These still work just fine, but \declaremodule should be
used instead.  The obsolete macros will print a warning on standard
out.