Update app.py

app.py

@@ -148,7 +148,7 @@ def predict(history_transformer_format):
     history_transformer_format[-1][1] = ""
     for new_token in streamer:
         if new_token != '<':
-            history_transformer_format[-1][1] += character
+            history_transformer_format[-1][1] += new_token
             yield history_transformer_format
 
 def user(message, history):