Convert formatting to use ruff instead of yapf + isort (#26247)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

tests/plugins_tests/test_scheduler_plugins.py

@@ -10,7 +10,6 @@ from vllm.v1.engine.llm_engine import LLMEngine
 
 
 class DummyV1Scheduler(Scheduler):
-
     def schedule(self):
         raise Exception("Exception raised by DummyV1Scheduler")
 
@@ -23,7 +22,6 @@ def test_scheduler_plugins_v1(monkeypatch: pytest.MonkeyPatch):
         m.setenv("VLLM_ENABLE_V1_MULTIPROCESSING", "0")
 
         with pytest.raises(Exception) as exception_info:
-
             engine_args = EngineArgs(
                 model="facebook/opt-125m",
                 enforce_eager=True,  # reduce test time
@@ -36,5 +34,4 @@ def test_scheduler_plugins_v1(monkeypatch: pytest.MonkeyPatch):
             engine.add_request("0", "foo", sampling_params)
             engine.step()
 
-        assert str(
-            exception_info.value) == "Exception raised by DummyV1Scheduler"
+        assert str(exception_info.value) == "Exception raised by DummyV1Scheduler"