Bump black from 25.12.0 to 26.1.0

[dependabot]

Bumps black from 25.12.0 to 26.1.0.

Release notes

Sourced from black's releases.

26.1.0

Highlights

Introduces the 2026 stable style (#4892), stabilizing the following changes:

• always_one_newline_after_import: Always force one blank line after import statements, except when the line after the import is a comment or an import statement (#4489)
• fix_fmt_skip_in_one_liners: Fix # fmt: skip behavior on one-liner declarations, such as def foo(): return "mock" # fmt: skip, where previously the declaration would have been incorrectly collapsed (#4800)
• fix_module_docstring_detection: Fix module docstrings being treated as normal strings if preceded by comments (#4764)
• fix_type_expansion_split: Fix type expansions split in generic functions (#4777)
• multiline_string_handling: Make expressions involving multiline strings more compact (#1879)
• normalize_cr_newlines: Add \r style newlines to the potential newlines to normalize file newlines both from and to (#4710)
• remove_parens_around_except_types: Remove parentheses around multiple exception types in except and except* without as (#4720)
• remove_parens_from_assignment_lhs: Remove unnecessary parentheses from the left-hand side of assignments while preserving magic trailing commas and intentional multiline formatting (#4865)
• standardize_type_comments: Format type comments which have zero or more spaces between # and type: or between type: and value to # type: (value) (#4645)

The following change was not in any previous stable release:

• Regenerated the _width_table.py and added tests for the Khmer language (#4253)

This release alo bumps pathspec to v1 and fixes inconsistencies with Git's .gitignore logic (#4958). Now, files will be ignored if a pattern matches them, even if the parent directory is directly unignored. For example, Black would previously format exclude/not_this/foo.py with this .gitignore:

exclude/
!exclude/not_this/

Now, exclude/not_this/foo.py will remain ignored. To ensure exclude/not_this/ and all of it's children are included in formatting (and in Git), use this .gitignore:

*/exclude/*
!*/exclude/not_this/

This new behavior matches Git. The leading */ are only necessary if you wish to ignore matching subdirectories (like the previous behavior did), and not just matching root

... (truncated)

Changelog

Sourced from black's changelog.

26.1.0

Highlights

Introduces the 2026 stable style (#4892), stabilizing the following changes:

• always_one_newline_after_import: Always force one blank line after import statements, except when the line after the import is a comment or an import statement (#4489)
• fix_fmt_skip_in_one_liners: Fix # fmt: skip behavior on one-liner declarations, such as def foo(): return "mock" # fmt: skip, where previously the declaration would have been incorrectly collapsed (#4800)
• fix_module_docstring_detection: Fix module docstrings being treated as normal strings if preceded by comments (#4764)
• fix_type_expansion_split: Fix type expansions split in generic functions (#4777)
• multiline_string_handling: Make expressions involving multiline strings more compact (#1879)
• normalize_cr_newlines: Add \r style newlines to the potential newlines to normalize file newlines both from and to (#4710)
• remove_parens_around_except_types: Remove parentheses around multiple exception types in except and except* without as (#4720)
• remove_parens_from_assignment_lhs: Remove unnecessary parentheses from the left-hand side of assignments while preserving magic trailing commas and intentional multiline formatting (#4865)
• standardize_type_comments: Format type comments which have zero or more spaces between # and type: or between type: and value to # type: (value) (#4645)

The following change was not in any previous stable release:

• Regenerated the _width_table.py and added tests for the Khmer language (#4253)

This release alo bumps pathspec to v1 and fixes inconsistencies with Git's .gitignore logic (#4958). Now, files will be ignored if a pattern matches them, even if the parent directory is directly unignored. For example, Black would previously format exclude/not_this/foo.py with this .gitignore:

exclude/
!exclude/not_this/

Now, exclude/not_this/foo.py will remain ignored. To ensure exclude/not_this/ and all of it's children are included in formatting (and in Git), use this .gitignore:

*/exclude/*
!*/exclude/not_this/

This new behavior matches Git. The leading */ are only necessary if you wish to ignore

... (truncated)

Commits

• 6305bf1 Prepare 2026.1.0 release (#4892)
• e71305b Bump pypa/cibuildwheel from 3.3.0 to 3.3.1 (#4961)
• 21a2a8c Fix Shutdown multiprocessing Manager in schedule_formatting (#4952)
• e3146ce Bump docker/setup-buildx-action from 3.11.1 to 3.12.0 (#4919)
• fe1fbc4 Bump actions/upload-artifact from 5.0.0 to 6.0.0 (#4923)
• 2b4b7fc Bump actions/download-artifact from 6.0.0 to 7.0.0 (#4922)
• d745be6 docs: document --force-exclude for pre-commit workflows (#4957)
• b41acd6 Various CI and doc refactors (#4928)
• 6f43612 Handle pathspec v1 changes (#4958)
• 200c550 Bump furo from 2025.9.25 to 2025.12.19 in /docs (#4933)
• Additional commits viewable in compare view

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---

Resolves #4892
Resolves #4489
Resolves #4800
Resolves #4764
Resolves #4777
Resolves #1879
Resolves #4710
Resolves #4720
Resolves #4865
Resolves #4645
Resolves #4253
Resolves #4958
Resolves #4961
Resolves #4952
Resolves #4919
Resolves #4923
Resolves #4922
Resolves #4957
Resolves #4928
Resolves #4933

[github-actions]

🤖 Claude Code Review

Code Review

Overview

This PR updates the black dependency from version 25.12.0 to 26.1.0 for Python versions greater than 3.11.

Checklist Review

Code Quality

✅ Code follows style guide

• This is a dependency version bump in pyproject.toml - no code style issues apply

✅ No commented-out code

• N/A - dependency file only

✅ Meaningful variable names

• N/A - dependency file only

✅ DRY principle followed

• N/A - dependency file only

✅ Identify Defects

• No logic errors, bugs, or security vulnerabilities introduced
• Version bump appears to be a routine maintenance update
• Python version conditional (python_version > '3.11') is correctly maintained

✅ Project memory configuration

• .claude/CLAUDE.md exists and specifies black as a linting tool
• The update aligns with maintaining code quality standards mentioned in project docs

Testing

⚠️ Testing considerations

• No tests are modified or added (expected for dependency updates)
• Recommendation: Verify that existing linting passes with the new black version by running:

  black --check src/

• Consider if any code formatting changes occur that would require commits

Documentation

✅ Documentation

• No documentation updates needed for a patch version dependency bump
• CHANGELOG.md: Not updated, but this may be intentional for automated dependency updates (Dependabot)

Security

✅ No hardcoded credentials

• N/A

✅ Input validation

• N/A

✅ Proper error handling

• N/A

✅ No sensitive data in logs

• N/A

✅ No license files or AQAAAD strings

• None detected in diff

Summary

Status: ✅ APPROVED

This is a straightforward dependency version bump for the black code formatter. The change is isolated to a single version number update and poses minimal risk.

Action Items:

1. Verify linting passes with new black version: black --check src/
2. If any formatting changes occur, commit them separately
3. Consider updating CHANGELOG.md if this project tracks dependency updates (optional for automated Dependabot PRs)

No blocking issues identified.

Automated code review analyzing defects and coding standards