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Bump psf/black from 23.11.0 to 26.3.0 in /.github/workflows#258

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Bump psf/black from 23.11.0 to 26.3.0 in /.github/workflows#258
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@dependabot dependabot Bot commented on behalf of github Jul 6, 2026

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Bumps psf/black from 23.11.0 to 26.3.0.

Release notes

Sourced from psf/black's releases.

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

  • Emit a clear warning when the target Python version is newer than the running Python version, since AST safety checks cannot parse newer syntax. Also replace the misleading "INTERNAL ERROR" message with an actionable error explaining the version mismatch (#4983)

Blackd

  • Introduce winloop to be used when windows in use which enables blackd to run faster on windows when winloop is installed. (#4996)

Integrations

  • Remove unused gallery script (#5030)
  • Harden parsing of black requirements in the GitHub Action when use_pyproject is enabled so that only version specifiers are accepted and direct references such as black @ https://... are rejected. Users should upgrade to the latest version of the action as soon as possible. This update is received automatically when using psf/black@stable, and is independent of the version of Black installed by the

... (truncated)

Changelog

Sourced from psf/black's changelog.

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)

Output

  • Emit a clear warning when the target Python version is newer than the running Python version, since AST safety checks cannot parse newer syntax. Also replace the misleading "INTERNAL ERROR" message with an actionable error explaining the version mismatch (#4983)

Blackd

  • Introduce winloop to be used when windows in use which enables blackd to run faster on windows when winloop is installed. (#4996)

Integrations

  • Remove unused gallery script (#5030)
  • Harden parsing of black requirements in the GitHub Action when use_pyproject is enabled so that only version specifiers are accepted and direct references such as black @ https://... are rejected. Users should upgrade to the latest version of the action as soon as possible. This update is received automatically when using

... (truncated)

Commits

@dependabot dependabot Bot added dependencies Pull requests that update a dependency file github_actions Pull requests that update GitHub Actions code labels Jul 6, 2026
Bumps [psf/black](https://github.com/psf/black) from 23.11.0 to 26.3.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.11.0...26.3.0)

---
updated-dependencies:
- dependency-name: psf/black
  dependency-version: 26.3.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot force-pushed the dependabot/github_actions/dot-github/workflows/psf/black-26.3.0 branch from 1ab6c33 to f6de21c Compare July 6, 2026 12:52
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