Release 22.1.0 · psf/black

At long last, Black is no longer a beta product! This is the first non-beta release and the first release covered by our new stability policy.

Deprecate --experimental-string-processing and move the functionality under --preview (#2789)
For stubs, one blank line between class attributes and methods is now kept if there's at least one pre-existing blank line (#2736)
Black now normalizes string prefix order (#2297)
Remove spaces around power operators if both operands are simple (#2726)
Work around bug that causes unstable formatting in some cases in the presence of the magic trailing comma (#2807)
Use parentheses for attribute access on decimal float and int literals (#2799)
Don't add whitespace for attribute access on hexadecimal, binary, octal, and complex literals (#2799)
Treat blank lines in stubs the same inside top-level if statements (#2820)
Fix unstable formatting with semicolons and arithmetic expressions (#2817)
Fix unstable formatting around magic trailing comma (#2572)

Fix mapping cases that contain as-expressions, like case {"key": 1 | 2 as password} (#2686)
Fix cases that contain multiple top-level as-expressions, like case 1 as a, 2 as b (#2716)
Fix call patterns that contain as-expressions with keyword arguments, like case Foo(bar=baz as quux) (#2749)
Tuple unpacking on return and yield constructs now implies 3.8+ (#2700)
Unparenthesized tuples on annotated assignments (e.g values: Tuple[int, ...] = 1, 2, 3) now implies 3.8+ (#2708)
Fix handling of standalone match() or case() when there is a trailing newline or a comment inside of the parentheses. (#2760)
from __future__ import annotations statement now implies Python 3.7+ (#2690)

Speed-up the new backtracking parser about 4X in general (enabled when --target-version is set to 3.10 and higher). (#2728)
Black is now compiled with mypyc for an overall 2x speed-up. 64-bit Windows, MacOS, and Linux (not including musl) are supported. (#1009, #2431)

Do not accept bare carriage return line endings in pyproject.toml (#2408)
Add configuration option (python-cell-magics) to format cells with custom magics in Jupyter Notebooks (#2744)
Allow setting custom cache directory on all platforms with environment variable BLACK_CACHE_DIR (#2739).
Enable Python 3.10+ by default, without any extra need to specify --target-version=py310. (#2758)
Make passing SRC or --code mandatory and mutually exclusive (#2804)

Improve error message for invalid regular expression (#2678)
Improve error message when parsing fails during AST safety check by embedding the underlying SyntaxError (#2693)
No longer color diff headers white as it's unreadable in light themed terminals (#2691)
Text coloring added in the final statistics (#2712)
Verbose mode also now describes how a project root was discovered and which paths will be formatted. (#2526)

Change protocol in pip installation instructions to https:// (#2761)
Change HTML theme to Furo primarily for its responsive design and mobile support (#2793)
Deprecate the black-primer tool (#2809)
Document Python support policy (#2819)

Full Changelog: 21.12b0...22.1.0

@isidentical for their continued work on making our Python 3.10 support better than ever (we made them a co-maintainer 🎉)
@hauntsaninja for their help improving our stub style
@nipunn1313 making Black more stable (which has been a long running battle)
.. and all of my fellow co-maintainers who have made working on this project a wonderful ride @JelleZijlstra @cooperlees @felix-hilden @ambv @zsol

And also congrats to first contributors!

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