Re: [vim/vim] Wrong display width for U+24C2 CIRCLED LATIN CAPITAL LETTER M (Issue #20989)

zahlman left a comment (vim/vim#20989)

Ah... I looked up the Unicode block (wondering what version of Unicode added it) and found on Wikipedia:

> The Enclosed Alphanumerics block contains one [emoji](https://en.wikipedia.org/wiki/Emoji): U+24C2, the enclosed M[[5]](https://en.wikipedia.org/wiki/Enclosed_Alphanumerics#cite_note-UTR51-5)[[6]](https://en.wikipedia.org/wiki/Enclosed_Alphanumerics#cite_note-EmojiData-6) (Ⓜ️), which is used as a symbol for [mask works](https://en.wikipedia.org/wiki/Mask_work). Ⓜ️ can also represent [rapid transit](https://en.wikipedia.org/wiki/Rapid_transit) (metro) rail.

So it seems that variation selectors *are* implicitly involved, in some fashion, even though the text doesn't have one.

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