[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci]

updates:

• github.com/psf/black-pre-commit-mirror: 25.11.0 → 26.5.1
• github.com/pycqa/isort: 7.0.0 → 9.0.0a3
• github.com/editorconfig-checker/editorconfig-checker: v3.6.0 → v3.7.0
• github.com/python-jsonschema/check-jsonschema: 0.35.0 → 0.37.2
• github.com/rhysd/actionlint: v1.7.9 → v1.7.12

[gaoflow]

I dug into the tox failures on this PR. The failures are confined to the *-chardet tox factors; the ordinary Python tox jobs are passing.

The failing jobs are installing the latest chardet (chardet==7.4.3 in the CI logs). That changes several detected encoding names compared with the versions this test suite expects, for example:

• windows-1255 is reported as ISO-8859-8
• GB2312 is reported as cp1250
• SHIFT_JIS is reported as cp932
• TIS-620 is reported as cp874
• EUC-KR is reported as CP949

This looks unrelated to the pre-commit/rfc822 formatting changes in the PR. The chardet tox dependency currently floats to latest, so the CI result changed under the branch.

A minimal fix is to cap the chardet factor to the major version the current expectations are compatible with:

diff --git a/tox.ini b/tox.ini
index 3440a1b01..d75442946 100644
--- a/tox.ini
+++ b/tox.ini
@@ -57,7 +57,7 @@ extras =
 passenv = CI
 deps =
     -r requirements/test/requirements.txt
-    chardet: chardet
+    chardet: chardet<6
 commands =
     coverage run -m pytest {posargs:}

I verified the affected tests locally against the installed chardet==5.2.0:

PYTEST_DISABLE_PLUGIN_AUTOLOAD=1 PYTHONPATH=. python -m pytest -q tests/test_ill_formed.py tests/test_encoding.py
# 219 passed in 0.19s

git diff --check
# no output

I could not run the full tox matrix in this environment because tox is not installed here and the runner is critically low on disk space, but the failing CI evidence points specifically at the floating chardet dependency. I do not have push access to this branch, so I am leaving the patch here for the branch owner to apply.