[Misc] Fix grammar errors in comments and messages (#31115)

Signed-off-by: c0de128 <kevin.mckay@outlook.com>

tests/quantization/test_compressed_tensors.py

@@ -83,7 +83,7 @@ def test_compressed_tensors_w8a8_static_setup(vllm_runner, model_args):
         current_platform.is_rocm()
         and model_path not in ROCM_TRITON_SCALED_MM_SUPPORTED_INT8_MODEL
     ):
-        pytest.skip(f"Skip model {model_path} as it is not support on ROCm.")
+        pytest.skip(f"Skip model {model_path} as it is not supported on ROCm.")
 
     with vllm_runner(model_path, enforce_eager=True) as llm:
 
@@ -161,7 +161,7 @@ def test_compressed_tensors_w8a8_logprobs(
         current_platform.is_rocm()
         and model_path not in ROCM_TRITON_SCALED_MM_SUPPORTED_INT8_MODEL
     ):
-        pytest.skip(f"Skip model {model_path} as it is not support on ROCm.")
+        pytest.skip(f"Skip model {model_path} as it is not supported on ROCm.")
 
     if use_aiter:
         if model_path not in ROCM_AITER_SUPPORTED_INT8_MODEL:
@@ -231,7 +231,7 @@ def test_compressed_tensors_w8a8_dynamic_per_token(
         current_platform.is_rocm()
         and model_path not in ROCM_TRITON_SCALED_MM_SUPPORTED_INT8_MODEL
     ):
-        pytest.skip(f"Skip model {model_path} as it is not support on ROCm.")
+        pytest.skip(f"Skip model {model_path} as it is not supported on ROCm.")
 
     if use_aiter:
         if model_path not in ROCM_AITER_SUPPORTED_INT8_MODEL:

vllm/attention/ops/merge_attn_states.py

@@ -15,7 +15,7 @@ def merge_attn_states(
     output_lse: torch.Tensor | None = None,
 ) -> None:
     # NOTE(DefTruth): Currently, custom merge_attn_states CUDA kernel
-    # is not support for FP8 dtype, fallback to use Triton kernel.
+    # does not support FP8 dtype, fallback to use Triton kernel.
     def supported_dtypes(o: torch.Tensor) -> bool:
         return o.dtype in [torch.float32, torch.half, torch.bfloat16]