<!-- Include any especially major or disruptive changes here -->
+- Runtime support for Python 3.7 has been removed. Formatting 3.7 code will still be
+ supported until further notice (#3765)
+
### Stable style
<!-- Changes that affect Black's stable style -->
+- Fix a bug where an illegal trailing comma was added to return type annotations using
+ PEP 604 unions (#3735)
+- Fix several bugs and crashes where comments in stub files were removed or mishandled
+ under some circumstances. (#3745)
+- Fix a bug where multi-line open parenthesis magic comment like `type: ignore` were not
+ correctly parsed (#3740)
+- Fix error in AST validation when Black removes trailing whitespace in a type comment
+ (#3773)
+
### Preview style
<!-- Changes that affect Black's preview style -->
<!-- Changes to how Black can be configured -->
+- The `--workers` argument to Black can now be specified via the `BLACK_NUM_WORKERS`
+ environment variable (#3743)
- `.pytest_cache`, `.ruff_cache` and `.vscode` are now excluded by default (#3691)
+- Fix black not honouring `pyproject.toml` settings when running `--stdin-filename` and
+ the `pyproject.toml` found isn't in the current working directory (#3719)
+- Black will now error if `exclude` and `extend-exclude` have invalid data types in
+ `pyproject.toml`, instead of silently doing the wrong thing (#3764)
### Packaging
<!-- Changes to how Black is packaged, such as dependency requirements -->
+- Upgrade mypyc from 0.991 to 1.3 (#3697)
+- Remove patching of Click that mitigated errors on Python 3.6 with `LANG=C` (#3768)
+
### Parser
<!-- Changes to the parser or to version autodetection -->
<!-- Changes that improve Black's performance. -->
+- Speed up _Black_ significantly when the cache is full (#3751)
+- Avoid importing `IPython` in a case where we wouldn't need it (#3748)
+
### Output
<!-- Changes to Black's terminal output and error messages -->
- Use aware UTC datetimes internally, avoids deprecation warning on Python 3.12 (#3728)
+- Change verbose logging to exactly mirror _Black_'s logic for source discovery (#3749)
### _Blackd_
<!-- For example, Docker, GitHub Actions, pre-commit, editors -->
+- Black is now tested with
+ [`PYTHONWARNDEFAULTENCODING = 1`](https://docs.python.org/3/library/io.html#io-encoding-warning)
+ (#3763)
- Update GitHub Action to display black output in the job summary (#3688)
+- Deprecated `set-output` command in CI test to keep up to date with GitHub's
+ deprecation announcement (#3757)
### Documentation
+- Add a CITATION.cff file to the root of the repository, containing metadata on how to
+ cite this software (#3723)
+
<!-- Major changes to documentation and policies. Small docs changes
don't need a changelog entry. -->
+- Updated the _classes_ and _exceptions_ documentation in Developer reference to match
+ the latest ccode base. (#3755)
+
## 23.3.0
### Highlights