Update app.py

app.py

@@ -109,7 +109,7 @@ def bot(history, api_kind):
         print(prompt_html,'token count is',count_tokens(prompt_html))
         history[-1][1] = ""
         for character in generate_fn(prompt, history[:-1]):
-            history[-1][1] += character
+            history[-1][1] = character
             #yield history, prompt_html
         print('final history is ',history)
         return history, prompt_html