Update app.py

app.py

@@ -209,7 +209,7 @@ green_theme = gr.themes.Base(
 )
 
 
-  def message_and_history(message, history):
+def message_and_history(message, history):
     # Initialize conversation with a welcome message if history is empty.
     if not history:
         history = [{"role": "assistant", "content": "<b>LA2050 Navigator:</b><br> Welcome to the LA2050 ideas hub! How can I help you today?"}]