bug#52038: Completion for user mailcap entries

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

>> Thanks for looking at this.  My impression back then was that the entry
>> "application/vnd.ms-excel" is coming from `mailcap-mime-data' and
>> "application/vnd\.ms-excel" is generated by the function
>> `mailcap-parse-mailcap' which is called inside `mailcap-parse-mailcaps'
>> where the former pushes the entries in ~/.mailcap through
>> `regexp-quote'.  So I think the bug is that 2 different entries are
>> generated for the same mime-type.  Or am I missing something?
>
> Hm, yes -- I had this backwards.  Reopening.

I've now fixed this in Emacs 29 -- there were several instances of
confusion between regexp-quoted minor parts and not, but I think I've
got them all.  (If you see more, please say so.)