0.33 append bot role

app.py

@@ -181,8 +181,8 @@ def clear():
     return [], []
 
 def reveal_bot(chatbot_a, chatbot_b):
-    chatbot_a.append("I am Bot Arno")
-    chatbot_b.append("I am Bot Bernd")
+    chatbot_a.append(["User", "I am Bot Arno"])
+    chatbot_b.append(["User", "I am Bot Bernd"])
     return chatbot_a, chatbot_b
 
 arena_notes = """## Important Notes: