I can add new columns

tests/controls/test_datagrid_columns_manager.py

@@ -36,7 +36,7 @@ class MockDataGrid(MultipleInstance):
   
   def get_table_name(self):
     return "mock_table"
-
+  
   def get_formula_engine(self):
     return None
 
@@ -163,7 +163,6 @@ class TestDataGridColumnsManagerBehaviour:
   def test_i_can_update_column_title(self, columns_manager):
     """Test updating a column's title via client_response."""
     columns_manager.save_column_details("name", {"title": "New Name"})
-    
     col_def = columns_manager._get_col_def_from_col_id("name")
     assert col_def.title == "New Name"