Update app.py

app.py

@@ -145,7 +145,7 @@ def piano_music_demo():
     prompt_df = df[ids].copy()
     prompt_piece = MidiPiece(df=part_a)
 
-    # Use your implementation here
+    # Use your implementation here:
     generated_df = music_generation_algorithm(prompt_df)
 
     generated_piece = MidiPiece(df=generated_df)