Style guide: use of punctuation full-width form

[yindesu]

This has, of course, been discussed in the past, and some of those discussions haven’t disappeared or been lost:

A definitive answer on full-width vs. half-width punctuation?

At least in Japanese release, characters named full-width or half-width by Unicode Standard should not be used. There is no rules to convert these characters between Unicode and JIS X 0213. (JIS X 0213 is the latest character encodingsets standard in Japan.)

Proper ellipsis for CJK titles

Fancy punctuation is supposed to be about correctness of the codepoint, not about trying to transcribe graphics into text. Recent example - Edit #82550890 - MusicBrainz Like you said, MIDLINE HORIZONTAL ELLIPSIS (⋯ U+22EF) is a math symbol. Thus, JIS X 0213 - Wikipedia does not include it, and uses HORIZONTAL ELLIPSIS (… U+2026) instead. Similar to how we want to use Katakana-Hiragana double hyphen (゠ U+30A0) rather than fullwidth equals sign (＝ U+FF1D), because we’re writing Katakana/Hiraga…