Re: master ed2b0bd: New faces in xref (bug#23179)

[Eli Zaretskii]

> From: Robert Pluim <address@hidden>
> Date: Mon, 15 Apr 2019 10:27:45 +0200
> Cc: address@hidden
> 
>     Juri> I see no other related faces (compilation/grep) mentioned
>     Juri> neither in NEWS nor in the manual.
> 
> True. Thatʼs arguably a deficiency in the manual.

I tend to agree.  Feel free to document at least the more important
ones ('error', 'warning').

>     Juri> But I could add new faces to NEWS if Eli decides to do so.
> 
> It would be a useful addition, I think.

I think we do call out new faces in NEWS, so I think these new ones
should be mentioned.