bug#54562: 28.0.91; Emoji sequence not composed

[Robert Pluim]

>>>>> On Fri, 25 Mar 2022 18:32:08 +0800, Po Lu via "Bug reports for GNU Emacs, 
>>>>> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org> said:

    Bug> Eli Zaretskii <eliz@gnu.org> writes:
    >> I think this means your default font doesn't support the U+20E3
    >> COMBINING ENCLOSING KEYCAP character.  Emacs cannot compose characters
    >> that aren't supported by the font used for the base character.

... except when you use the correct emoji sequence, which in this case
is

U+0037 U+FE0F U+20E3

    Bug> Thanks.  But does it really make sense to require that the default font
    Bug> (on my system, Source Code Pro) support Emoji?  20E3 COMBINING 
ENCLOSING
    Bug> KEYCAP displays by itself using Noto Color Emoji.

See above

Robert
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