bug#54562: 28.0.91; Emoji sequence not composed

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,  54562@debbugs.gnu.org
> Date: Sat, 26 Mar 2022 09:16:43 +0800
> 
> Robert Pluim <rpluim@gmail.com> writes:
> 
> > Iʼve just tested adding U+20E3 to
> > `auto-composition-emoji-eligible-codepoints', and it seems to work OK.
> 
> Works here too.

That's fine, but what is the conclusion here?  Unicode defines quite a
few more COMBINING ENCLOSING <SOMETHING> codepoints, so IMO either we
do this for all of them (the entire Combining Diacritical Marks for
Symbols block), or none at all.