swift

1cd4b0a5 - [stdlib] Rename `VectorProtocol.Scalar` to `VectorSpaceScalar`. (#25374)

[stdlib] Rename `VectorProtocol.Scalar` to `VectorSpaceScalar`. (#25374) A step towards machine learning optimizer revamp. The next step is to make `Tensor.VectorSpaceScalar = Float`. This makes `Tensor` scalar multiplication always work with `Float` instead of `Scalar`. Renaming `VectorProtocol.Scalar` is necessary. Otherwise, `Scalar` is ambiguous within `Tensor`'s type context: it may refer to either: - The witness type of `VectorProtocol.Scalar`, or - The `Scalar` generic parameter.