adding new line

Author: amontanez24

scripts/create_download_tracker.py

@@ -66,7 +66,7 @@ def _update_index_html(files, s3_client, dryrun=False):
             text_list.append('<br>')
 
     text_list.append(current_index_file[insertion_point:])
-    new_index = ''.join(text_list)
+    new_index = '\n'.join(text_list)
     if dryrun:
         print('New index file:')  # noqa: T201 `print` found
         print(new_index)  # noqa: T201 `print` found