21.8b0

Black

• Add support for formatting Jupyter Notebook files (#2357)
• Move from appdirs dependency to platformdirs (#2375)
• Present a more user-friendly error if .gitignore is invalid (#2414)
• The failsafe for accidentally added backslashes in f-string expressions has been hardened to handle more edge cases during quote normalization (#2437)
• Avoid changing a function return type annotation's type to a tuple by adding a trailing comma (#2384)
• Parsing support has been added for unparenthesized walruses in set literals, set comprehensions, and indices (#2447).
• Pin setuptools-scm build-time dependency version (#2457)
• Exclude typing-extensions version 3.10.0.1 due to it being broken on Python 3.10 (#2460)

Blackd

• Replace sys.exit(-1) with raise ImportError as it plays more nicely with tools that scan installed packages (#2440)

Integrations

• The provided pre-commit hooks no longer specify language_version to avoid overriding default_language_version (#2430)

21.7b0

Black

• Configuration files using TOML features higher than spec v0.5.0 are now supported
  (#2301)
• Add primer support and test for code piped into black via STDIN (#2315)
• Fix internal error when FORCE_OPTIONAL_PARENTHESES feature is enabled (#2332)
• Accept empty stdin (#2346)
• Provide a more useful error when parsing fails during AST safety checks (#2304)

Docker

• Add new latest_release tag automation to follow latest black release on docker
  images (#2374)

Integrations

• The vim plugin now searches upwards from the directory containing the current buffer
  instead of the current working directory for pyproject.toml. (#1871)
• The vim plugin now reads the correct string normalization option in pyproject.toml
  (#1869)
• The vim plugin no longer crashes Black when there's boolean values in pyproject.toml
  (#1869)

21.6b0

Black

• Fix failure caused by fmt: skip and indentation (#2281)
• Account for += assignment when deciding whether to split string (#2312)
• Correct max string length calculation when there are string operators (#2292)
• Fixed option usage when using the --code flag (#2259)
• Do not call uvloop.install() when Black is used as a library (#2303)
• Added --required-version option to require a specific version to be running (#2300)
• Fix incorrect custom breakpoint indices when string group contains fake f-strings
  (#2311)
• Fix regression where R prefixes would be lowercased for docstrings (#2285)
• Fix handling of named escapes (\N{...}) when --experimental-string-processing is
  used (#2319)

21.5b2

Black

• A space is no longer inserted into empty docstrings (#2249)
• Fix handling of .gitignore files containing non-ASCII characters on Windows (#2229)
• Respect .gitignore files in all levels, not only root/.gitignore file (apply
  .gitignore rules like git does) (#2225)
• Restored compatibility with Click 8.0 on Python 3.6 when LANG=C used (#2227)
• Add extra uvloop install + import support if in python env (#2258)
• Fix --experimental-string-processing crash when matching parens are not found (#2283)
• Make sure to split lines that start with a string operator (#2286)
• Fix regular expression that black uses to identify f-expressions (#2287)

Blackd

• Add a lower bound for the aiohttp-cors dependency. Only 0.4.0 or higher is
  supported. (#2231)

Packaging

• Release self-contained x86_64 MacOS binaries as part of the GitHub release pipeline
  (#2198)
• Always build binaries with the latest available Python (#2260)

Documentation

• Add discussion of magic comments to FAQ page (#2272)
• --experimental-string-processing will be enabled by default in the future (#2273)
• Fix typos discovered by codespell (#2228)
• Fix Vim plugin installation instructions. (#2235)
• Add new Frequently Asked Questions page (#2247)
• Fix encoding + symlink issues preventing proper build on Windows (#2262)

21.5b1

Black

• Refactor src/black/__init__.py into many files (#2206)

Documentation

• Replaced all remaining references to the master branch with the main branch. Some additional changes in the source code were also made. (#2210)
• Sigificantly reorganized the documentation to make much more sense. Check them out by heading over to the stable docs on RTD. (#2174)

21.5b0

Black

• Set --pyi mode if --stdin-filename ends in .pyi (#2169)
• Stop detecting target version as Python 3.9+ with pre-PEP-614 decorators that are
  being called but with no arguments (#2182)

Black-Primer

• Add --no-diff to black-primer to suppress formatting changes (#2187)

21.4b2

Black

• Fix crash if the user configuration directory is inaccessible. (#2158)

• Clarify
  circumstances
  in which Black may change the AST (#2159)

Packaging

• Install primer.json (used by black-primer by default) with black. (#2154)

21.4b1

Black

• Fix crash on docstrings ending with "\ ". (#2142)

• Fix crash when atypical whitespace is cleaned out of dostrings (#2120)

• Reflect the --skip-magic-trailing-comma and --experimental-string-processing flags
  in the name of the cache file. Without this fix, changes in these flags would not take
  effect if the cache had already been populated. (#2131)

• Don't remove necessary parentheses from assignment expression containing assert /
  return statements. (#2143)

Packaging

• Bump pathspec to >= 0.8.1 to solve invalid .gitignore exclusion handling

21.4b0

Black

• Fixed a rare but annoying formatting instability created by the combination of
  optional trailing commas inserted by Black and optional parentheses looking at
  pre-existing "magic" trailing commas. This fixes issue #1629 and all of its many many
  duplicates. (#2126)

• Black now processes one-line docstrings by stripping leading and trailing spaces,
  and adding a padding space when needed to break up """". (#1740)

• Black now cleans up leading non-breaking spaces in comments (#2092)

• Black now respects --skip-string-normalization when normalizing multiline
  docstring quotes (#1637)

• Black no longer removes all empty lines between non-function code and decorators
  when formatting typing stubs. Now Black enforces a single empty line. (#1646)

• Black no longer adds an incorrect space after a parenthesized assignment expression
  in if/while statements (#1655)

• Added --skip-magic-trailing-comma / -C to avoid using trailing commas as a reason
  to split lines (#1824)

• fixed a crash when PWD=/ on POSIX (#1631)

• fixed "I/O operation on closed file" when using --diff (#1664)

• Prevent coloured diff output being interleaved with multiple files (#1673)

• Added support for PEP 614 relaxed decorator syntax on python 3.9 (#1711)

• Added parsing support for unparenthesized tuples and yield expressions in annotated
  assignments (#1835)

• use lowercase hex strings (#1692)

• added --extend-exclude argument (PR #2005)

• speed up caching by avoiding pathlib (#1950)

• --diff correctly indicates when a file doesn't end in a newline (#1662)

• Added --stdin-filename argument to allow stdin to respect --force-exclude rules
  (#1780)

• Lines ending with fmt: skip will now be not formatted (#1800)

• PR #2053: Black no longer relies on typed-ast for Python 3.8 and higher

• PR #2053: Python 2 support is now optional, install with
  python3 -m pip install black[python2] to maintain support.

• Exclude venv directory by default (#1683)

• Fixed "Black produced code that is not equivalent to the source" when formatting
  Python 2 docstrings (#2037)

Packaging

• Self-contained native Black binaries are now provided for releases via GitHub
  Releases (#1743)

20.8b1

v20.8b1 - now with Click 7