bug#37774: 27.0.50; new :extend attribute broke visuals of all themes and other packages

[Eli Zaretskii]

> From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
> Cc: rudalics@gmx.at,  spacibba@aol.com,  jonas@bernoul.li,
>   37774@debbugs.gnu.org
> Date: Thu, 05 Dec 2019 20:05:01 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Why are you using values for :inherit that are lists of one element?
> > Why not just ":inherit FACE"?
> 
> … You can just ":inherit FACE"?

>From the ELisp manual:

  ‘:inherit’
       The name of a face from which to inherit attributes, or a list of
       face names.  [...] If a list of faces is used, attributes from
       faces earlier in the list override those from later faces.

> > But yes, this is a bug: the value of :inherit can legitimately be a
> > list.  Should be fixed now, thanks.
> 
> Can confirm, thanks!

Thanks for testing.