bug#54562: 28.0.91; Emoji sequence not composed

[Eli Zaretskii]

> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: luangruo@yahoo.com,  rpluim@gmail.com,  54562@debbugs.gnu.org,
>   larsi@gnus.org
> Date: Mon, 28 Mar 2022 19:39:43 +0200
> 
> On Mär 28 2022, Eli Zaretskii wrote:
> 
> > Try this (only very lightly tested):
> >
> >   (defun fonts-supporting-char (test-char)
> 
> Doesn't work.  It claims support for a lot of fonts that don't contain
> that character.

For base characters also, or only for combining characters?