[Misc] Fix typo: seperator -> separator in flashmla_sparse.py (#32411)

Signed-off-by: Guofang Tang <tinggofun@gmail.com>
Co-authored-by: Guofang Tang <tinggofun@gmail.com>

vllm/v1/attention/backends/mla/flashmla_sparse.py

@@ -149,7 +149,7 @@ class FlashMLASparseMetadata(AttentionMetadata):
         cache_lens: torch.Tensor
 
     @dataclass
-    class FP8SeperatePrefillDecode:
+    class FP8SeparatePrefillDecode:
         @dataclass
         class Decode:
             kernel_metadata: "FlashMLASparseMetadata.FP8KernelMetadata"
@@ -196,7 +196,7 @@ class FlashMLASparseMetadata(AttentionMetadata):
         decode: Decode | None = None
         prefill: Prefill | None = None
 
-    fp8_extra_metadata: FP8SeperatePrefillDecode | FP8KernelMetadata | None = None
+    fp8_extra_metadata: FP8SeparatePrefillDecode | FP8KernelMetadata | None = None
     fp8_use_mixed_batch: bool = False
 
 
@@ -485,7 +485,7 @@ class FlashMLASparseMetadataBuilder(AttentionMetadataBuilder[FlashMLASparseMetad
     def _build_fp8_separate_prefill_decode(
         self,
         common_attn_metadata: CommonAttentionMetadata,
-    ) -> "FlashMLASparseMetadata.FP8SeperatePrefillDecode":
+    ) -> "FlashMLASparseMetadata.FP8SeparatePrefillDecode":
         num_tokens = common_attn_metadata.num_actual_tokens
 
         (num_decodes, num_prefills, num_decode_tokens, num_prefill_tokens) = (
@@ -496,7 +496,7 @@ class FlashMLASparseMetadataBuilder(AttentionMetadataBuilder[FlashMLASparseMetad
             )
         )
 
-        FP8Meta = FlashMLASparseMetadata.FP8SeperatePrefillDecode
+        FP8Meta = FlashMLASparseMetadata.FP8SeparatePrefillDecode
         fp8_metadata = FP8Meta(
             num_decodes=num_decodes,
             num_prefills=num_prefills,
@@ -659,7 +659,7 @@ class FlashMLASparseMetadataBuilder(AttentionMetadataBuilder[FlashMLASparseMetad
         req_id_per_token = self.req_id_per_token_buffer[:num_tokens]
 
         fp8_extra_metadata: (
-            FlashMLASparseMetadata.FP8SeperatePrefillDecode
+            FlashMLASparseMetadata.FP8SeparatePrefillDecode
             | FlashMLASparseMetadata.FP8KernelMetadata
             | None
         ) = None
@@ -765,7 +765,7 @@ class FlashMLASparseImpl(MLACommonBaseImpl[FlashMLASparseMetadata]):
         attn_metadata: FlashMLASparseMetadata,
     ) -> torch.Tensor:
         fp8_metadata = attn_metadata.fp8_extra_metadata
-        assert isinstance(fp8_metadata, FlashMLASparseMetadata.FP8SeperatePrefillDecode)
+        assert isinstance(fp8_metadata, FlashMLASparseMetadata.FP8SeparatePrefillDecode)
         num_decodes = fp8_metadata.num_decodes
 
         prefill_request_ids = None
@@ -794,7 +794,7 @@ class FlashMLASparseImpl(MLACommonBaseImpl[FlashMLASparseMetadata]):
         )
 
         fp8_metadata = attn_metadata.fp8_extra_metadata
-        assert isinstance(fp8_metadata, FlashMLASparseMetadata.FP8SeperatePrefillDecode)
+        assert isinstance(fp8_metadata, FlashMLASparseMetadata.FP8SeparatePrefillDecode)
 
         def _fp8_decode(q: torch.Tensor, topk_indices: torch.Tensor) -> torch.Tensor:
             # Reshape q: (num_decode_tokens, num_heads, head_dim)