Update app.py

app.py

@@ -147,6 +147,9 @@ with gr.Blocks() as demo:
                         else:
                             history[-1][1] += delta
                         yield history
+            if history[-1][1].endswith('</s>'):
+                history[-1][1] = history[-1][1][:-4]
+                yield history
 
     msg.submit(user, [msg, chatbot], [msg, chatbot], queue=False).then(
         fn=bot,