Update app.py

app.py

@@ -410,7 +410,7 @@ def graceful_exit_node(state: State) -> State:
   prompt = f'You are a chemistry agent that has not been able to fulfill the task assigned. \
 Write an apology to the user and include any information in the CONTEXT below, just in case it can \
 prove useful. \n \
-CONTEXT: {props_string} \'
+CONTEXT: {props_string}'
 
   res = chat_model.invoke(prompt)