provided that its fontsets are configured with a suitable font. To
make this easier out of the box, the following should be done:
-*** Populate composition-function-table with Emoji rules
-The Unicode Character Database (UCD) includes several data files that
-define the valid Emoji sequences. These files should be imported into
-the Emacs tree, and should be converted by some script at Emacs build
-time to Lisp code that populates composition-function-table with the
-corresponding composition rules.
-
-*** Augment the default fontsets with Emoji-capable fonts
-The default fontsets set up by fontest.el should include known free
-fonts that provide good support for displaying Emoji sequences. In
-addition, the rule that the default face's font is used for symbol and
-punctuation characters, disregarding the fontsets, should be modified
-to exempt Emoji from this rule (since Emoji characters belong to the
-'symbol' script in Emacs), so that use-default-font-for-symbols would
-not have to be tweaked to have Emoji display by default with a capable
-font. (This has now been implemented, but only one font is currently
-considered, please augment the list).
-
-*** Consider changing the default display of Variation Selectors
-Emacs by default displays the Variation Selector (VS) codepoints not
-composed with base characters as hex codes in a box. The Unicode FAQ
-says that if variation sequences cannot be supported, the VS
-characters should not be shown, leaving just the base character of the
-sequence visible. This could be handled via glyphless-char-display,
-by changing the entries for VS codepoints to 'zero-width'. Or we
-could display them as a thin 1-pixel space, as we do with format
-control characters, by using 'thin-space' there.
-
*** Special face for displaying text presentation of Emoji
Emoji-capable fonts support Emoji sequences with the U+FE0F VARIATION
SELECTOR-16 (VS16) for emoji-style display, but usually don't support
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