bug#28047: 25.2; Add another show-paren face

[Felipe Ochoa]

Great, thank you!

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Felipe Ochoa <felipe.nospam.ochoa@gmail.com>
>> Date: Fri, 11 Aug 2017 15:47:39 +0200
>>
>> I use show-paren-style in mixed mode, and would like to be able to use
>> different faces depending on whether the match is being displayed in
>> 'expression style or 'parenthesis (I want a stronger contrast in
>> parenthesis than in expression). The attached patch splits the
>> show-paren-match face into two, show-paren-match-expression and
>> show-paren-match, using inheritance to make the split styling opt-in.
>>
>> With this change, users can style the two faces separately if they wish.
>
> Thanks, pushed to master.