chore: import upstream snapshot with attribution

2026-07-13 12:07:39 +08:00
commit d0aab9212a
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+<!-- Hello! Thanks for submitting a PR. To help make things go a bit smoother
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+
+### Description
+
+<!-- Good things to put here include: reasoning for the change (please link
+     any relevant issues!), any noteworthy (or hacky) choices to be aware of,
+     or what the problem resolved here looked like ... we won't mind a ranty
+     story :) -->
+
+### Checklist - did you ...
+
+<!-- If any of the following items aren't relevant for your contribution,
+     please still tick them so we know you've gone through the checklist.
+
+     - Please familiarize yourself with Black's stability policy, linked
+       below. Code style changes are only allowed under the `--preview` flag
+       until maintainers move them to stable in the next calendar year.
+     - All user-facing changes should get a changelog entry. If this isn't
+       user-facing, signal to us that this should get the magical label to
+       silence the check.
+     - Tests are required for all bugfixes and new features.
+     - Documentation changes are necessary for most formatting changes and
+       other enhancements. -->
+
+- [ ] Implement any code style changes under the `--preview` style, following the stability policy?
+- [ ] Add an entry in `CHANGES.md` if necessary?
+- [ ] Add / update tests if necessary?
+- [ ] Add new / update outdated documentation?
+
+<!-- Just as a reminder, everyone in all psf/black spaces, including PRs, must
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+     Helpful links:
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+     - PSF COC: https://www.python.org/psf/conduct/
+     - Contributing docs: https://black.readthedocs.io/en/latest/contributing/index.html
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+     - Stability policy: https://black.readthedocs.io/en/stable/the_black_code_style/index.html -->