fix: style

api/core/app/entities/task_entities.py

@@ -52,6 +52,7 @@ class WorkflowTaskState(TaskState):
     answer: str = ""
     outputs: Optional[Mapping[str, Any]] = None
 
+
 class StreamEvent(Enum):
     """
     Stream event

api/core/workflow/nodes/answer/answer_stream_processor.py

@@ -28,10 +28,9 @@ class AnswerStreamProcessor(StreamProcessor):
         self.current_stream_chunk_generating_node_ids: dict[str, list[str]] = {}
         self.has_output = False
         self.output_node_ids: set[str] = set()
-        
+
     def process(self, generator: Generator[GraphEngineEvent, None, None]) -> Generator[GraphEngineEvent, None, None]:
         for event in generator:
-
             if isinstance(event, NodeRunStartedEvent):
                 if event.route_node_state.node_id == self.graph.root_node_id and not self.rest_node_ids:
                     self.reset()