RustCrypto
Use the API as intended by the subtle crate authors
This is admittedly a very nit-picky change, but according to the Subtle documentation (https://docs.rs/subtle/latest/subtle/struct.Choice.html#note), a Choice should be converted to a bool using the From implementation. Specifically they added the following note to the unwrap_u8 documentation:
This function only exists as an escape hatch for the rare case where it’s not possible to use one of the subtle-provided trait impls. To convert a Choice to a bool, use the From implementation instead.
That functionality didn’t exist at the time this was written. We’ve slowly been migrating.
All that said, that isn’t the correct way to turbofish Into, and I think in such cases the compiler can infer the proper type.
