Function block_aligner::simulate::rand_mutate_insert

pub fn rand_mutate_insert<R: Rng>(
    a: &[u8], 
    k: usize, 
    alpha: &[u8], 
    insert_len: usize, 
    rng: &mut R
) -> Vec<u8>

Given an input byte string, create a randomly mutated copy with a single long random insert.