Format four files ruff had drifted from

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01H7LwYgJfpkbLCTeiAf8U4A

backend/tests/api/routes/test_flows.py

@@ -118,9 +118,12 @@ def test_editing_does_not_deploy_until_published(
     ).json()
     assert saved["has_draft"] is True
     # Nothing is running yet, so the engine knows no nodes of this flow.
-    assert client.get(f"{PREFIX}/staged/state", headers=superuser_token_headers).json()[
-        "nodes"
-    ] == []
+    assert (
+        client.get(f"{PREFIX}/staged/state", headers=superuser_token_headers).json()[
+            "nodes"
+        ]
+        == []
+    )
 
     published = client.post(
         f"{PREFIX}/staged/publish",