diff --git a/openedx/core/djangoapps/content/block_structure/models.py b/openedx/core/djangoapps/content/block_structure/models.py
index 4be1092339..4872e09346 100644
--- a/openedx/core/djangoapps/content/block_structure/models.py
+++ b/openedx/core/djangoapps/content/block_structure/models.py
@@ -266,7 +266,7 @@ class BlockStructureModel(TimeStampedModel):
                 len(all_files_by_date),
                 data_usage_key,
                 num_to_keep,
-            )            
+            )
         except Exception:  # pylint: disable=broad-except
             log.exception('BlockStructure: Exception when deleting old files; data_usage_key: %s.', data_usage_key)