Fixing the spacing in assistant function

app.py

@@ -32,7 +32,7 @@ class BasicAgent:
         class AgentState(TypedDict):
             messages: Annotated[list[AnyMessage], add_messages]
 
-         def assistant(state: AgentState):
+        def assistant(state: AgentState):
             user_message = state["messages"][-1]
             if isinstance(user_message, HumanMessage):
                 result = self.search_tool.invoke(user_message.content)