style: pre-commit fixes

tests/conftest.py

@@ -212,9 +212,9 @@ def pytest_configure():
 
 def pytest_report_header(config):
     del config  # Unused.
-    assert (
-        pybind11_tests.compiler_info is not None
-    ), "Please update pybind11_tests.cpp if this assert fails."
+    assert pybind11_tests.compiler_info is not None, (
+        "Please update pybind11_tests.cpp if this assert fails."
+    )
     return (
         "C++ Info:"
         f" {pybind11_tests.compiler_info}"

tests/test_eigen_matrix.py

@@ -244,9 +244,9 @@ def test_eigen_ref_to_python():
     chols = [m.cholesky1, m.cholesky2, m.cholesky3, m.cholesky4]
     for i, chol in enumerate(chols, start=1):
         mymat = chol(np.array([[1.0, 2, 4], [2, 13, 23], [4, 23, 77]]))
-        assert np.all(
-            mymat == np.array([[1, 0, 0], [2, 3, 0], [4, 5, 6]])
-        ), f"cholesky{i}"
+        assert np.all(mymat == np.array([[1, 0, 0], [2, 3, 0], [4, 5, 6]])), (
+            f"cholesky{i}"
+        )
 
 
 def assign_both(a1, a2, r, c, v):

tests/test_smart_ptr.py

@@ -313,9 +313,8 @@ def test_smart_ptr_from_default():
     instance = m.HeldByDefaultHolder()
     with pytest.raises(RuntimeError) as excinfo:
         m.HeldByDefaultHolder.load_shared_ptr(instance)
-    assert (
-        "Unable to load a custom holder type from a "
-        "default-holder instance" in str(excinfo.value)
+    assert "Unable to load a custom holder type from a default-holder instance" in str(
+        excinfo.value
     )