Style: Flake8 fixes

src/engine.py

@@ -318,8 +318,8 @@ class Player:
 
         This method expects that the entry is pre-loaded using `preload(..)` or
         `preload_group(self, entries)` before being played.
-        In case the pre-loading has happened for a group of entries, only the first entry of the group
-        needs to be passed.
+        In case the pre-loading has happened for a group of entries, only the first entry of the
+        group needs to be passed.
 
         Args:
             entry (PlaylistEntry):          The audio source to be played
@@ -338,6 +338,7 @@ class Player:
             current_metadata = ResourceUtil.generate_track_metadata(entry)
             json_meta = json.dumps(current_metadata, ensure_ascii=False)
             res = self.connector.send_lqc_command("engine", "set_track_metadata", json_meta)
+            self.logger.info(f"Liquidsoap 'set_track_metadata' response: ${res}")
 
             # Instant activation or fade-in
             self.connector.enable_transaction()