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The @-mention detection regex now recognizes CJK punctuation marks (。、？！) as valid word boundaries, improving mention detection in Chinese, Japanese, and Korean text. Previously, typing @file。 wouldn't trigger autocomplete, but now it does.
Evidence
CJK regex patterns (search for "\u3002\u3001\uFF1F\uFF01")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.