Under the hood
Useful1 Signal1
Identifier names are capped at 64 characters and more invisible characters are stripped.
What's wrong with this entry?
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What
Two identifier checks that accepted names of any length now cap them at 64 characters, the line-start matcher recognises the U+001C to U+001E separator characters, and the routine that strips invisible characters was replaced with a broader Unicode class match.
Evidence
/^[A-Z][a-zA-Z]{0,63}$/
Strings lifted out of the shipped bundle, so the claim above can be checked against them.