bug#33224: `message-simplify-subject' simplification (and extensibility)

[Lars Ingebrigtsen <larsi@gnus.org>]

"Garreau, Alexandre" <galex-713@galex-713.eu> writes:

> Hi, here a patch simplyfing `message-simplify-subject' to make it
> extensible (users can now add their own tailor-made one-arg function to
> `message-simplify-subject-functions'), by removing all the explicit
> checks and funcall, and just calling all the functions (implicit check
> for `message-strip-list-identifiers' is moved to its body, and one for
> `message-strip-subject-re' is removed based on previous patch from
> <Bug#33200>).

I have no idea why that function was written in that strange way, and
I've applied your patch.

> This is my second patch, please tell-me if there’s a problem anywhere.
> Not sure if I know how to make patch properly, nor to report bugs
> properly.

Everything seems to work for me when testing.  As your total added lines
was less than ten, no FSF copyright assignment paperwork is needed, but
if you intend on contributing further, it might be nice to start that
process now.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no