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

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

tests/quantization/test_lm_head.py

@@ -9,10 +9,10 @@ import pytest
 import torch
 
 from vllm.model_executor.layers.quantization.gptq import GPTQLinearMethod
-from vllm.model_executor.layers.quantization.gptq_marlin import (
-    GPTQMarlinLinearMethod)
+from vllm.model_executor.layers.quantization.gptq_marlin import GPTQMarlinLinearMethod
 from vllm.model_executor.layers.vocab_parallel_embedding import (
-    UnquantizedEmbeddingMethod)
+    UnquantizedEmbeddingMethod,
+)
 
 PROMPT = "On the surface of Mars, we found"
 
@@ -31,20 +31,20 @@ def test_lm_head(
 ) -> None:
     # `LLM.apply_model` requires pickling a function.
     monkeypatch.setenv("VLLM_ALLOW_INSECURE_SERIALIZATION", "1")
-    with vllm_runner(model_id, dtype=torch.float16,
-                     max_model_len=2048) as vllm_model:
+    with vllm_runner(model_id, dtype=torch.float16, max_model_len=2048) as vllm_model:
 
         def check_model(model):
             lm_head_layer = model.lm_head
             if lm_head_quantized:
-                assert isinstance(lm_head_layer.quant_method,
-                                  (GPTQLinearMethod, GPTQMarlinLinearMethod))
+                assert isinstance(
+                    lm_head_layer.quant_method,
+                    (GPTQLinearMethod, GPTQMarlinLinearMethod),
+                )
             else:
-                assert isinstance(lm_head_layer.quant_method,
-                                  UnquantizedEmbeddingMethod)
+                assert isinstance(
+                    lm_head_layer.quant_method, UnquantizedEmbeddingMethod
+                )
 
         vllm_model.apply_model(check_model)
 
-        print(
-            vllm_model.generate_greedy(["Hello my name is"],
-                                       max_tokens=10)[0][1])
+        print(vllm_model.generate_greedy(["Hello my name is"], max_tokens=10)[0][1])