On my super out of date mac, Allo renders an unrecognized emoji as U+25A1 WHITE SQUARE, not U+FFFD REPLACEMENT CHARACTER as it should. Anyone know if this is Mac's fault, Chrome's, or Allo's? (/cc @FakeUnicode)pic.twitter.com/DdTMjoFJ7L
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Unsupported glyphs ("tofu") should be shown as plain white boxes. Sometimes with hex, or X, or ?, or as plain ?. These are valid unicode codepoints or sequences with no font support. Invalid code point references or byte sequences (not tofu) become � REPLACEMENT CHARACTER.
So is that "1 inside a square" just how Mac deals with the .notdef glyph? Any idea why the ZWJ is being rendered?
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