Update app.py

app.py

@@ -25,7 +25,7 @@ for model_name, model_endpoint in API_ENDPOINTS.items():
 
 def format(instruction = "", history = "", input = "", preinput = ""):
     sy_l, sy_r = SPECIAL_SYMBOLS[0], SPECIAL_SYMBOLS[1]
-    formatted_history = '\n'.join(f"{{sy_l}{message}{sy_r}" for message in history)
+    formatted_history = '\n'.join(f"{sy_l}{message}{sy_r}" for message in history)
     task_message = f"{instruction}\n{formatted_history}\n{sy_l}{input}{sy_r}\n{preinput}"
     return prompt