refac: fix merge and format

tests/test_graph.py

@@ -1,21 +1,20 @@
 import json
-from langflow.graph.nodes import (
-    WrapperNode,
-    AgentNode,
-    ToolNode,
-    ChainNode,
-    PromptNode,
-    LLMNode,
-    ToolkitNode,
-    FileToolNode,
-)
 
 import pytest
 from langchain.agents import AgentExecutor
 from langflow.graph import Edge, Graph, Node
+from langflow.graph.nodes import (
+    AgentNode,
+    ChainNode,
+    FileToolNode,
+    LLMNode,
+    PromptNode,
+    ToolkitNode,
+    ToolNode,
+    WrapperNode,
+)
 from langflow.utils.payload import build_json, get_root_node
 
-
 # Test cases for the graph module
 
 # now we have three types of graph: