bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate

[Robert Pluim]

>>>>> On Tue, 30 May 2023 19:32:23 +0300, Eli Zaretskii <eliz@gnu.org> said:

    >> (set-char-table-range
    >> composition-function-table
    >> #x1F44D 
    >> '(["\U0001f44d\ufe0f" 0 font-shape-gstring]))
    >> 
    >> gives me this, where the two '|' align perfectly.

    Eli> Here, there _is_ a composition.

    Eli> So there are two issues here: (a) why there's no composition in the
    Eli> first case, and (b) why does "C-u C-x =" says there is when there
    Eli> isn't.

OK. I can poke around in gdb if you give me some idea of what I should
be looking at.

Robert
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