fix format

Author: sycai

bigframes/core/rewrite/timedeltas.py

@@ -110,7 +110,6 @@ def _rewrite_sub_op(left: _TypedExpr, right: _TypedExpr) -> _TypedExpr:
     if dtypes.is_datetime_like(left.dtype) and dtypes.is_datetime_like(right.dtype):
         return _TypedExpr.create_op_expr(ops.timestamp_diff_op, left, right)
 
-
     if dtypes.is_datetime_like(left.dtype) and right.dtype is dtypes.TIMEDELTA_DTYPE:
         return _TypedExpr.create_op_expr(ops.timestamp_sub_op, left, right)
 

tests/system/small/operations/test_timedeltas.py

@@ -196,9 +196,6 @@ def test_timestamp_sub__ts_series_minus_td_series(temporal_dfs, column, pd_dtype
     pandas.testing.assert_series_equal(
         actual_result, expected_result, check_index_type=False
     )
-    
-
-
 
 
 @pytest.mark.parametrize(
@@ -220,7 +217,6 @@ def test_timestamp_sub__ts_series_minus_td_literal(temporal_dfs, column, pd_dtyp
     )
 
 
-
 def test_timestamp_sub__ts_literal_minus_td_series(temporal_dfs):
     bf_df, pd_df = temporal_dfs
     literal = pd.Timestamp("2025-01-01 01:00:00")
@@ -253,7 +249,6 @@ def test_timestamp_sub_with_numpy_op(temporal_dfs, column, pd_dtype):
     )
 
 
-
 def test_timestamp_sub_dataframes(temporal_dfs):
     columns = ["datetime_col", "timestamp_col"]
     timedelta = pd.Timedelta(1, unit="s")
@@ -269,8 +264,8 @@ def test_timestamp_sub_dataframes(temporal_dfs):
     pandas.testing.assert_frame_equal(
         actual_result, expected_result, check_index_type=False
     )
-    
-    
+
+
 @pytest.mark.parametrize(
     "compare_func",
     [
@@ -296,8 +291,7 @@ def test_timedelta_series_comparison(temporal_dfs, compare_func):
         actual_result, expected_result, check_index_type=False
     )
 
-  
-  
+
 @pytest.mark.parametrize(
     "compare_func",
     [
@@ -319,9 +313,7 @@ def test_timedelta_series_and_literal_comparison(temporal_dfs, compare_func):
     pandas.testing.assert_series_equal(
         actual_result, expected_result, check_index_type=False
     )
-    
-    
-    
+
 
 def test_timedelta_filtering(session):
     pd_series = pd.Series(
@@ -341,11 +333,10 @@ def test_timedelta_filtering(session):
     )
 
     expected_result = pd_series[(pd_series - timestamp) > pd.Timedelta(1, "h")]
-
     pandas.testing.assert_series_equal(
         actual_result, expected_result, check_index_type=False
     )
-      
+
 
 def test_timedelta_ordering(session):
     pd_df = pd.DataFrame(