The emoji feature detection that occurs on every page load by default has been broken at least since [45769], causing the feature detection to fail for browsers that in fact support emoji correctly. This has led to the `wp-emoji-release.min.js` file being loaded unnecessarily even in modern browsers, which accounts for roughly 4.7 KB of extra JavaScript on every page load.
This changeset fixes the feature detection, by using the correct sequences of char codes.
Props sergiomdgomes, dmsnell, peterwilsoncc.
Fixes#57301.
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