update prompt

app.py

@@ -995,31 +995,31 @@ Example of final answer:\n\
 
 FORMAT_INSTRUCTIONS_STRUC = """ 
 When it is necessary to use tools and you must use the following format to output "Thought", "Action" (json blob):\n
-'''
+
 Thought: you should always think about what to do and consider previous and subsequent steps
 Action:
 ```
-{
+{{
     \"action\": $TOOL_NAME,
     \"action_input\": "the input to the action"
-}
+}}
 ```
 Observation: the result of the action.
-'''
+
 $TOOL_NAME should be one of [{tool_names}]
 If **Thought**, **Action** is missing in the response of using tools, you must re-write the response.
 
 ---\n When you are able to provide final answer, you must use the following format to output "Thought", "Action" (json blob):
-'''
+
 Thought: I know what to respond
 Action:
 ```
-{
+{{
     \"action": \"Final Answer\", 
     \"action_input": \"Final response to human\"
-}
+}}
 ```
-'''
+
 If **Thought**, **Action** is missing in the response of using tools, you must re-write the response.
 
 """