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Bump black from 25.12.0 to 26.3.1#4197

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Bump black from 25.12.0 to 26.3.1#4197
dependabot[bot] wants to merge 1 commit intomasterfrom
dependabot/pip/black-26.3.1

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@dependabot dependabot bot commented on behalf of github Mar 12, 2026 •
edited by jasonleenaylor
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Bumps black from 25.12.0 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.

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)

... (truncated)

Commits

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This change is Reviewable

@dependabot
Bump black from 25.12.0 to 26.3.1
440834a 
Bumps [black](https://github.com/psf/black) from 25.12.0 to 26.3.1.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@25.12.0...26.3.1)

---
updated-dependencies:
- dependency-name: black
  dependency-version: 26.3.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot bot added dependencies Pull requests that update a dependency file python labels Mar 12, 2026
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codecov bot commented Mar 12, 2026 •
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.15%. Comparing base (c6afad4) to head (440834a).

Additional details and impacted files 
@@           Coverage Diff           @@
##           master    #4197   +/-   ##
=======================================
  Coverage   75.15%   75.15%           
=======================================
  Files         302      302           
  Lines       11099    11099           
  Branches     1394     1394           
=======================================
  Hits         8341     8341           
  Misses       2357     2357           
  Partials      401      401
Flag Coverage Δ
backend 86.52% <ø> (ø)
frontend 66.34% <ø> (ø)

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dependabot bot commented on behalf of github Mar 16, 2026

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.

@dependabot dependabot bot deleted the dependabot/pip/black-26.3.1 branch March 16, 2026 18:32
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