bug#47074: Replace XPM icons with Unicode codepoints in customize/widgets

[Eli Zaretskii]

> From: Stefan Kangas <stefan@marxist.se>
> Date: Sat, 3 Apr 2021 15:06:57 -0500
> Cc: Alan Third <alan@idiocy.org>, 47074@debbugs.gnu.org
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> Date: Mon, 15 Mar 2021 21:34:24 +0000
> >> From: Alan Third <alan@idiocy.org>
> >> Cc: stefan@marxist.se, 47074@debbugs.gnu.org
> >>
> >> Here's my final patch, then. Again Stefan's patch is required first.
> >
> > Thanks.  As discussed elsewhere, Stefan's patch will have to be
> > slightly reworked to allow Emacs without SVG support to display
> > equivalent images of other formats.
> 
> I have now pushed it to master.  The XPM files are now used when
> configuring --without-rsvg, and SVG is used otherwise (the default
> case).

Thanks.  How can this new feature be tested?  That is, how can I be
sure my Emacs indeed loads the SVG images when they are available?