complying with black formatting

Author: kirill-bash

tests/test_frame.py

@@ -385,7 +385,9 @@ def test_types_drop_duplicates() -> None:
 
     if not PD_LTE_22:
         check(assert_type(df.drop_duplicates({"AAA"}), pd.DataFrame), pd.DataFrame)
-        check(assert_type(df.drop_duplicates({"AAA": None}), pd.DataFrame), pd.DataFrame)
+        check(
+            assert_type(df.drop_duplicates({"AAA": None}), pd.DataFrame), pd.DataFrame
+        )
 
 
 def test_types_fillna() -> None: