Change Digest to make {:x

[gjvnq]

fn example<D: Digest>() {
    let mut hasher = D::new();
    hasher.input(b"hello world");
    let hash = hasher.result();
    println!("{:x}", hash);
}

fn example<D: Digest>() where <D as sha2::Digest>::OutputSize: std::ops::Add, <<D as sha2::Digest>::OutputSize as std::ops::Add>::Output: sha2::digest::generic_array::ArrayLength<u8>   {
    let mut hasher = D::new();
    hasher.input(b"hello world");
    let hash = hasher.result();
    println!("{:x}", hash);
}

[tarcieri]

It sounds like you want Digest outputs to impl fmt::LowerHex?

Unfortunately right now they’re GenericArrays, so we can’t impl traits on them

[tarcieri]

Dup of #102