v23.10.1

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Highlights

• Maintanence release to get a fix out for GitHub Action edge case (#​3957)

Preview style

• Fix merging implicit multiline strings that have inline comments (#​3956)
• Allow empty first line after block open before a comment or compound statement (#​3967)

Packaging

• Change Dockerfile to hatch + compile black (#​3965)

Integrations

• The summary output for GitHub workflows is now suppressible using the summary
  parameter. (#​3958)
• Fix the action failing when Black check doesn't pass (#​3957)

Documentation

• It is known Windows documentation CI is broken
  https://github.com/psf/black/issues/39683968

v23.10.0

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Stable style

• Fix comments getting removed from inside parenthesized strings (#​3909)

Preview style

• Fix long lines with power operators getting split before the line length (#​3942)
• Long type hints are now wrapped in parentheses and properly indented when split across
  multiple lines (#​3899)
• Magic trailing commas are now respected in return types. (#​3916)
• Require one empty line after module-level docstrings. (#​3932)
• Treat raw triple-quoted strings as docstrings (#​3947)

Configuration

• Fix cache versioning logic when BLACK_CACHE_DIR is set (#​3937)

Parser

• Fix bug where attributes named type were not acccepted inside match statements
  (#​3950)
• Add support for PEP 695 type aliases containing lambdas and other unusual expressions
  (#​3949)

Output

• Black no longer attempts to provide special errors for attempting to format Python 2
  code (#​3933)
• Black will more consistently print stacktraces on internal errors in verbose mode
  (#​3938)

Integrations

• The action output displayed in the job summary is now wrapped in Markdown (#​3914)

v23.9.1

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Due to various issues, the previous release (23.9.0) did not include compiled mypyc
wheels, which make Black significantly faster. These issues have now been fixed, and
this release should come with compiled wheels once again.

There will be no wheels for Python 3.12 due to a bug in mypyc. We will provide 3.12
wheels in a future release as soon as the mypyc bug is fixed.

Packaging

• Upgrade to mypy 1.5.1 (#​3864)

Performance

• Store raw tuples instead of NamedTuples in Black's cache, improving performance and
  decreasing the size of the cache (#​3877)

v23.9.0

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Preview style

• More concise formatting for dummy implementations (#​3796)
• In stub files, add a blank line between a statement with a body (e.g an
  if sys.version_info > (3, x):) and a function definition on the same level (#​3862)
• Fix a bug whereby spaces were removed from walrus operators within subscript(#​3823)

Configuration

• Black now applies exclusion and ignore logic before resolving symlinks (#​3846)

Performance

• Avoid importing IPython if notebook cells do not contain magics (#​3782)
• Improve caching by comparing file hashes as fallback for mtime and size (#​3821)

Blackd

• Fix an issue in blackd with single character input (#​3558)

Integrations

• Black now has an
  official pre-commit mirror. Swapping
  https://github.com/psf/black to https://github.com/psf/black-pre-commit-mirror in
  your .pre-commit-config.yaml will make Black about 2x faster (#​3828)
• The .black.env folder specified by ENV_PATH will now be removed on the completion
  of the GitHub Action (#​3759)

v23.7.0

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Highlights

• Runtime support for Python 3.7 has been removed. Formatting 3.7 code will still be
  supported until further notice (#​3765)

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 crash with multi-line magic comments like type: ignore within parentheses
  (#​3740)
• Fix error in AST validation when Black removes trailing whitespace in a type comment
  (#​3773)

Preview style

• Implicitly concatenated strings used as function args are no longer wrapped inside
  parentheses (#​3640)
• Remove blank lines between a class definition and its docstring (#​3692)

Configuration

• 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

• 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

• Add support for the new PEP 695 syntax in Python 3.12 (#​3703)

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

• 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

• The blackd argument parser now shows the default values for options in their help
  text (#​3712)

Integrations

• Black is now tested with
  PYTHONWARNDEFAULTENCODING = 1
  (#​3763)
• Update GitHub Action to display black output in the job summary (#​3688)

Documentation

• Add a CITATION.cff file to the root of the repository, containing metadata on how to
  cite this software (#​3723)
• Update the classes and exceptions documentation in Developer reference to match
  the latest code base (#​3755)

v23.9.16

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• add --classmethod-decorators (#​405)
• fix name collision for node_stack on python 3.12 (#​406)
• Use pypa/build to build the package (#​404)

v23.7.10

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• Add B034: re.sub/subn/split must pass flags/count/maxsplit as keyword arguments.
• Fix a crash and several test failures on Python 3.12, all relating to the B907
  check.
• Declare support for Python 3.12.

v23.6.5

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• Include tox.ini in MANIFEST.in for sdist. (#​389)
• Improve B033 (duplicate set items) (#​385)

v23.5.9

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• Add B033: Detect duplicate items in sets
• Add B908: Detect assertRauses like contexts only has top level statements that could throw
• Add B028: Allow stacklevel to be explicitly assigned as a positional argument
• Remove more < 3.8 checks / assertions

v23.3.23

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• flake8-bugbear is now >= 3.8.1 project like flake8>=6.0.0
  • This has allowed some more modern AST usage cleanup and less CI running etc.
• B030: Fix crash on certain unusual except handlers (e.g. except a[0].b:)

v3.14.0

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• Drop Python 3.7 support.

v1.7.2

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v1.7.1

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v1.7.0

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v5.12.0

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• Removed support for Python 3.7
  • Fixed incompatiblity with latest poetry version
  • Added support for directory limitations within built in git hook

v1.6.1

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v1.6.0

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v1.5.1

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v1.5.0

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v7.4.3

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v3.12.0

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• Added support for Python 3.12.
• Dropped support for EOL Python 3.7.
• mocker.resetall() now also resets mocks created by mocker.create_autospec (#390_).

.. _#390:https://github.com/pytest-dev/pytest-mock/pull/3900