Update app.py

app.py

@@ -79,8 +79,8 @@ demo = gr.ChatInterface(
     ],
     additional_inputs_accordion=gr.Accordion(open=True),
     theme=gr.themes.Soft(),
-    retry_btn=None;
-    undo_btn=None;
+    retry_btn=None,
+    undo_btn=None,
 )