Bump black from 25.1.0 to 26.3.1

[dependabot]

Bumps black from 25.1.0 to 26.3.1.

Release notes

Sourced from black's releases.

26.3.1

Stable style

• Prevent Jupyter notebook magic masking collisions from corrupting cells by using exact-length placeholders for short magics and aborting if a placeholder can no longer be unmasked safely (#5038)

Configuration

• Always hash cache filename components derived from --python-cell-magics so custom magic names cannot affect cache paths (#5038)

Blackd

• Disable browser-originated requests by default, add configurable origin allowlisting and request body limits, and bound executor submissions to improve backpressure (#5039)

26.3.0

Stable style

• Don't double-decode input, causing non-UTF-8 files to be corrupted (#4964)
• Fix crash on standalone comment in lambda default arguments (#4993)
• Preserve parentheses when # type: ignore comments would be merged with other comments on the same line, preventing AST equivalence failures (#4888)

Preview style

• Fix bug where if guards in case blocks were incorrectly split when the pattern had a trailing comma (#4884)
• Fix string_processing crashing on unassigned long string literals with trailing commas (one-item tuples) (#4929)
• Simplify implementation of the power operator "hugging" logic (#4918)

Packaging

• Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in frozen environments (#4930)

Performance

• Introduce winloop for windows as an alternative to uvloop (#4996)
• Remove deprecated function uvloop.install() in favor of uvloop.new_event_loop() (#4996)
• Rename maybe_install_uvloop function to maybe_use_uvloop to simplify loop installation and creation of either a uvloop/winloop evenloop or default eventloop (#4996)

Output

... (truncated)

Changelog

Sourced from black's changelog.

Version 26.3.1

Stable style

• Prevent Jupyter notebook magic masking collisions from corrupting cells by using exact-length placeholders for short magics and aborting if a placeholder can no longer be unmasked safely (#5038)

Configuration

• Always hash cache filename components derived from --python-cell-magics so custom magic names cannot affect cache paths (#5038)

Blackd

• Disable browser-originated requests by default, add configurable origin allowlisting and request body limits, and bound executor submissions to improve backpressure (#5039)

Version 26.3.0

Stable style

• Don't double-decode input, causing non-UTF-8 files to be corrupted (#4964)
• Fix crash on standalone comment in lambda default arguments (#4993)
• Preserve parentheses when # type: ignore comments would be merged with other comments on the same line, preventing AST equivalence failures (#4888)

Preview style

• Fix bug where if guards in case blocks were incorrectly split when the pattern had a trailing comma (#4884)
• Fix string_processing crashing on unassigned long string literals with trailing commas (one-item tuples) (#4929)
• Simplify implementation of the power operator "hugging" logic (#4918)

Packaging

• Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in frozen environments (#4930)

Performance

• Introduce winloop for windows as an alternative to uvloop (#4996)
• Remove deprecated function uvloop.install() in favor of uvloop.new_event_loop() (#4996)
• Rename maybe_install_uvloop function to maybe_use_uvloop to simplify loop installation and creation of either a uvloop/winloop eventloop or default eventloop (#4996)

... (truncated)

Commits

• c6755bb Prepare release 26.3.1 (#5046)
• 69973fd Harden blackd browser-facing request handling (#5039)
• 4937fe6 Fix some shenanigans with the cache file and IPython (#5038)
• 2e641d1 docs: remove outdated Black Playground references (#5044)
• c014b22 Remove unused internal code (#5041)
• 0dae20b Add new changelog (#5036)
• c5c1cbd Minor release patches (#5035)
• 7e5a828 docs: clarify relationship between Black style and PEP 8 (#5025)
• 69705de docs: add clearer pyproject configuration guidance (#5026)
• 35ea679 Prepare release 26.3.0 (#5032)
• Additional commits viewable in compare view

[github-actions]

Black Migration

Update: 25.1.0 → 26.3.1

✅ Migration completed successfully.

Migration output

=== v26.3.1 =========================================================
Source: inline script

Collecting black==26.3.1
  Downloading black-26.3.1-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl.metadata (91 kB)
Collecting click>=8.0.0 (from black==26.3.1)
  Downloading click-8.3.3-py3-none-any.whl.metadata (2.6 kB)
Collecting mypy-extensions>=0.4.3 (from black==26.3.1)
  Downloading mypy_extensions-1.1.0-py3-none-any.whl.metadata (1.1 kB)
Collecting packaging>=22.0 (from black==26.3.1)
  Downloading packaging-26.1-py3-none-any.whl.metadata (3.5 kB)
Collecting pathspec>=1.0.0 (from black==26.3.1)
  Downloading pathspec-1.1.0-py3-none-any.whl.metadata (14 kB)
Collecting platformdirs>=2 (from black==26.3.1)
  Downloading platformdirs-4.9.6-py3-none-any.whl.metadata (4.7 kB)
Collecting pytokens~=0.4.0 (from black==26.3.1)
  Downloading pytokens-0.4.1-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl.metadata (3.8 kB)
Downloading black-26.3.1-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl (1.8 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.8/1.8 MB 170.9 MB/s  0:00:00
Downloading pytokens-0.4.1-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl (268 kB)
Downloading click-8.3.3-py3-none-any.whl (110 kB)
Downloading mypy_extensions-1.1.0-py3-none-any.whl (5.0 kB)
Downloading packaging-26.1-py3-none-any.whl (95 kB)
Downloading pathspec-1.1.0-py3-none-any.whl (56 kB)
Downloading platformdirs-4.9.6-py3-none-any.whl (21 kB)
Installing collected packages: pytokens, platformdirs, pathspec, packaging, mypy-extensions, click, black

Successfully installed black-26.3.1 click-8.3.3 mypy-extensions-1.1.0 packaging-26.1 pathspec-1.1.0 platformdirs-4.9.6 pytokens-0.4.1
All done! ✨ 🍰 ✨
5 files left unchanged.

---

📋 Full migration logs