Fixed isort

Author: TomAugspurger

pandas/core/groupby/groupby.py

@@ -25,8 +25,7 @@ class providing the base-class of operations.
 
 from pandas.core.dtypes.cast import maybe_downcast_to_dtype
 from pandas.core.dtypes.common import (
-    ensure_float, is_extension_array_dtype, is_numeric_dtype, is_scalar
-)
+    ensure_float, is_extension_array_dtype, is_numeric_dtype, is_scalar)
 from pandas.core.dtypes.missing import isna, notna
 
 import pandas.core.algorithms as algorithms