style: pre-commit fixes

Author: pre-commit-ci[bot]

tests/conftest.py

@@ -314,18 +314,27 @@ def backport(sanatized_string: SanitizedString) -> SanitizedString:
 
     return backport
 
+
 _EXPECTED_T = TypeVar("_EXPECTED_T")
 
+
 # The implicit conversion from np.float32 is undesirable but currently accepted.
 # TODO: Avoid DeprecationWarning in `PyLong_AsLong` (and similar)
 # TODO: PyPy 3.8 does not behave like CPython 3.8 here yet (7.3.7)
 # https://github.com/pybind/pybind11/issues/3408
 @pytest.fixture
-def avoid_PyLong_AsLong_deprecation() -> Callable[[Callable[[SupportsIndex], _EXPECTED_T], SupportsIndex, _EXPECTED_T], bool]:
-    def check(convert: Callable[[SupportsIndex], _EXPECTED_T], value: SupportsIndex, expected: _EXPECTED_T) -> bool:
+def avoid_PyLong_AsLong_deprecation() -> Callable[
+    [Callable[[SupportsIndex], _EXPECTED_T], SupportsIndex, _EXPECTED_T], bool
+]:
+    def check(
+        convert: Callable[[SupportsIndex], _EXPECTED_T],
+        value: SupportsIndex,
+        expected: _EXPECTED_T,
+    ) -> bool:
         if sys.version_info < (3, 10) and env.CPYTHON:
             with pytest.deprecated_call():
                 return convert(value) == expected
         else:
             return convert(value) == expected
-    return check
+
+    return check

tests/test_builtin_casters.py

@@ -1,10 +1,7 @@
 from __future__ import annotations
 
-import sys
-
 import pytest
 
-import env
 from pybind11_tests import IncType, UserType
 from pybind11_tests import builtin_casters as m