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

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

tests/quantization/test_experts_int8.py

@@ -2,9 +2,10 @@
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 # flake8: noqa
-"""Tests experts_int8 quantization startup and generation, 
+"""Tests experts_int8 quantization startup and generation,
 doesn't test correctness
 """
+
 import pytest
 
 from tests.quantization.utils import is_quant_method_supported
@@ -14,8 +15,10 @@ from ..models.registry import HF_EXAMPLE_MODELS
 MODELS = ["ai21labs/Jamba-tiny-random", "pfnet/plamo-2-1b"]
 
 
-@pytest.mark.skipif(not is_quant_method_supported("experts_int8"),
-                    reason="ExpertsInt8 is not supported on this GPU type.")
+@pytest.mark.skipif(
+    not is_quant_method_supported("experts_int8"),
+    reason="ExpertsInt8 is not supported on this GPU type.",
+)
 @pytest.mark.parametrize("model", MODELS)
 @pytest.mark.parametrize("dtype", ["bfloat16"])
 @pytest.mark.parametrize("max_tokens", [10])
@@ -30,6 +33,5 @@ def test_model_experts_int8_startup(
     model_info = HF_EXAMPLE_MODELS.find_hf_info(model)
     model_info.check_transformers_version(on_fail="skip")
 
-    with vllm_runner(model, dtype=dtype,
-                     quantization="experts_int8") as vllm_model:
+    with vllm_runner(model, dtype=dtype, quantization="experts_int8") as vllm_model:
         vllm_model.generate_greedy(example_prompts, max_tokens)