add back blank line

Author: Dr-Irv

pandas/core/groupby/groupby.py

@@ -1180,6 +1180,7 @@ def _resolve_numeric_only(self, numeric_only: bool | lib.NoDefault) -> bool:
 
             else:
                 numeric_only = False
+
         # error: Incompatible return value type (got "Union[bool, NoDefault]",
         # expected "bool")
         return numeric_only  # type: ignore[return-value]