bug#57499: Documentation bug in the docstring of set-face-attribute?

[Eli Zaretskii]

> Date: Thu, 01 Sep 2022 19:35:35 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: 57499-done@debbugs.gnu.org
> 
> > It isn't deprecated, it's invalid.  There's no need to have anything 
> > like this in NEWS, because all our documentation says the color 
> > attributes can have only string values (in addition to 'unspecified').
> >
> 
> Okay (I thought you wanted to retain the "undocumented but not really 
> invalid" use of nil).
> 
> >
> > Warning: nil value for `%s' is invalid, use 'unspecified instead.
> >
> 
> I added the name of the face in the message, which is I think useful to 
> locate the cause of the warning.

Thanks, SGTM.

> Should this go to master or to emacs-28?

To master, please.