Re: comments in .mailrc treated inconsistently

[Richard M. Stallman]

    The functions build-mail-abbrevs and build-mail-aliases are very
    similar. However, build-mail-abbrevs ignores comments (anything in a
    line that follows `# ') while build-mail-aliases doesn't do that.

Why does it matter?  The code in build-mail-aliases only looks
for certain kinds of lines, which start with `source' or `alias'
or `group'.  Comment lines ought to be ignored anyway, as far
as I can see.

Have you encountered a particular case that fails?
If so, please send a precise test case, and I'll debug it.