[pre-commit.ci] auto fixes from pre-commit.com hooks

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src/_pytest/python_api.py

@@ -274,7 +274,10 @@ class ApproxMapping(ApproxBase):
                 else:
                     max_rel_diff = max(
                         max_rel_diff,
-                      abs((approx_value.expected - other_value) / approx_value.expected),
+                        abs(
+                            (approx_value.expected - other_value)
+                            / approx_value.expected
+                        ),
                     )
                 different_ids.append(approx_key)