[Frontend] Chat-based Embeddings API (#9759)

vllm/pooling_params.py

@@ -7,7 +7,7 @@ class PoolingParams(
         msgspec.Struct,
         omit_defaults=True,  # type: ignore[call-arg]
         array_like=True):  # type: ignore[call-arg]
-    """Pooling parameters for pooling.
+    """Pooling parameters for embeddings API.
 
     Attributes:
         additional_data: Any additional data needed for pooling.
@@ -16,7 +16,7 @@ class PoolingParams(
 
     def clone(self) -> "PoolingParams":
         """Returns a deep copy of the PoolingParams instance."""
-        return PoolingParams(additional_data=self.additional_data, )
+        return PoolingParams(additional_data=self.additional_data)
 
     def __repr__(self) -> str:
         return (f"PoolingParams("