Remove whitespace

Author: NathanWorkman

tests/test_line_items.py

@@ -55,7 +55,7 @@ def test_get_line_item_detailed_report(self):
     def test_update_line_item(self):
         with open('./tests/test_files/examples/lineitem_update.json', 'r') as new_lineitem_file:
             update_lineitem_data = json.load(new_lineitem_file)
-        
+
         # Success response
         responses.add(
             responses.POST,