Stable style

• Fix crash when # fmt: off is used before a closing parenthesis or bracket. (#4363)

Packaging

• Packaging metadata updated: docs are explictly linked, the issue tracker is now also linked. This improves the PyPI listing for Black. (#4345)

Parser

• Fix regression where Black failed to parse a multiline f-string containing another multiline string (#4339)
• Fix regression where Black failed to parse an escaped single quote inside an f-string (#4401)
• Fix bug with Black incorrectly parsing empty lines with a backslash (#4343)
• Fix bugs with Black's tokenizer not handling \{ inside f-strings very well (#4422)
• Fix incorrect line numbers in the tokenizer for certain tokens within f-strings (#4423)

Performance

• Improve performance when a large directory is listed in .gitignore (#4415)

Blackd

• Fix blackd (and all extras installs) for docker container (#4357)