fix ruff format

Author: jab416171

src/comfy_sdk/workflows.py

@@ -124,6 +124,7 @@ def add_node(
                         node_inputs[key] = [node_id, value[1]]
 
         return node_id
+
     def remove_node(self, node_id: str) -> None:
         """Remove a node and redirect links through it back to their sources.
 

tests/test_workflows.py

@@ -197,6 +197,8 @@ def test_add_node_auto_id_on_empty_graph():
     wf = Workflow({})
     new_id = wf.add_node("X")
     assert new_id == "1"
+
+
 def test_remove_node_model_attention_backend():
     graph = {
         "1": {