bug#29405: 27.0.50; message-faces: Doc fixes and syntax touch-ups

[Katsumi Yamaoka]

On Fri, 01 Dec 2017 10:51:06 +0200, Eli Zaretskii wrote:
>> From: "Basil L. Contovounesios" <contovob@tcd.ie>
>> Date: Wed, 22 Nov 2017 20:48:28 +0000

>> I attach three patches pertaining to the faces defined in
>> lisp/gnus/message.el in descending order of importance:

>> 1. Fix docstring mistakes and inconsistencies.

>> 2. Use define-obsolete-face-alias instead of duplicating it.

>> 3. Use the newer (DISPLAY . PLIST) face spec syntax,
>>    as per `(elisp) Defining Faces'.

> Lars, Yamaoka-san -- any comments on these?

> I've installed the first one on the emacs-26 branch, as it's clearly a
> bugfix in doc strings.  But I would like to hear your opinions on the
> rest.

I think all are very good fixes.
`3.' makes XEmacs malfunction AFAIK, but of course it's OK.

Thanks.