apply ruff formatting

Author: KRRT7

tests/test_optional/test_figure_factory/test_validate_gantt.py

@@ -5,6 +5,7 @@
 
 pd = optional_imports.get_module("pandas")
 
+
 @pytest.mark.parametrize("input_type", ["list", "dataframe"])
 def test_valid_with_extra_keys(input_type):
     """Test that extra keys beyond required ones are preserved."""
@@ -29,7 +30,6 @@ def test_valid_with_extra_keys(input_type):
     assert result[1]["Finish"] == "2020-01-04"
 
 
-
 def test_missing_required_key_in_dataframe():
     df = pd.DataFrame(
         [
@@ -64,7 +64,6 @@ def test_list_with_dict_missing_all_keys():
     assert result is input_data
 
 
-
 def test_large_list_with_non_dict_first_element():
     input_data = [
         "Not a dict",
@@ -81,7 +80,6 @@ def test_large_list_with_non_dict_first_element():
         validate_gantt(input_data)
 
 
-
 def test_dataframe_column_order_and_index():
     df = pd.DataFrame(
         [