CI(deps): Update black to v25 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence	Type	Update
black (changelog)	24.10.0 -> 25.1.0						major
psf/black-pre-commit-mirror	24.10.0 -> 25.1.0					repository	major

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Release Notes

psf/black (black)

v25.1.0

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Highlights

This release introduces the new 2025 stable style (#​4558), stabilizing
the following changes:

• Normalize casing of Unicode escape characters in strings to lowercase (#​2916)
• Fix inconsistencies in whether certain strings are detected as docstrings (#​4095)
• Consistently add trailing commas to typed function parameters (#​4164)
• Remove redundant parentheses in if guards for case blocks (#​4214)
• Add parentheses to if clauses in case blocks when the line is too long (#​4269)
• Whitespace before # fmt: skip comments is no longer normalized (#​4146)
• Fix line length computation for certain expressions that involve the power operator (#​4154)
• Check if there is a newline before the terminating quotes of a docstring (#​4185)
• Fix type annotation spacing between * and more complex type variable tuple (#​4440)

The following changes were not in any previous release:

• Remove parentheses around sole list items (#​4312)
• Generic function definitions are now formatted more elegantly: parameters are
  split over multiple lines first instead of type parameter definitions (#​4553)

Stable style

• Fix formatting cells in IPython notebooks with magic methods and starting or trailing
  empty lines (#​4484)
• Fix crash when formatting with statements containing tuple generators/unpacking
  (#​4538)

Preview style

• Fix/remove string merging changing f-string quotes on f-strings with internal quotes
  (#​4498)
• Collapse multiple empty lines after an import into one (#​4489)
• Prevent string_processing and wrap_long_dict_values_in_parens from removing
  parentheses around long dictionary values (#​4377)
• Move wrap_long_dict_values_in_parens from the unstable to preview style (#​4561)

Packaging

• Store license identifier inside the License-Expression metadata field, see
  PEP 639. (#​4479)

Performance

• Speed up the is_fstring_start function in Black's tokenizer (#​4541)

Integrations

• If using stdin with --stdin-filename set to a force excluded path, stdin won't be
  formatted. (#​4539)

psf/black-pre-commit-mirror (psf/black-pre-commit-mirror)

v25.1.0

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[echoix]

Approving and getting this merged, as it reduces the diff to switch to ruff format after this to only 27 files, being mostly assert with the condition kept on one line and the explanation string on another instead of awkwardly split, and some similar cases in if conditions.

[wenzeslaus]

I would say this is another good improvement of the style.

[echoix]

I would say this is another good improvement of the style.

Black had only 5 files changed, ruff format was the rest, except for 27 files changed back by black.