Update app.py

app.py

@@ -174,7 +174,7 @@ class Demo:
     def __init__(self):
         pass
 
-    async def generation_code(self, query: Optional[str], _setting: Dict[str, str], _history: Optional[History]):
+async def generation_code(self, query: Optional[str], _setting: Dict[str, str], _history: Optional[History]):
     if not query or query.strip() == '':
         query = random.choice(DEMO_LIST)['description']