Update app.py

app.py

@@ -35,7 +35,7 @@ with gr.Blocks() as demo:
         return gr.update(value="", interactive=False), history + [[user_message,None]]
     def bot(history):
         # chat_history.append(message)  # Initialize chat history
-        history[-1][1] = ""
+        history[-1][1] = " "
         bot_message = palm.chat(
             context=context,
             examples=examples,