fix ruff warnings

Author: gilbertohasnofb

src/utils/__init__.py

@@ -1,3 +1,10 @@
+"""
+utils
+=====
+
+Collection of utilities.
+"""
+
 from .add_final_bar_line import add_final_bar_line
 from .add_initial_clefs import add_initial_clefs
 from .add_initial_tempo import add_initial_tempo