Macro doe::vec_sort

macro_rules! vec_sort {
    ($vec:expr) => { ... };
}

sort vec and return sorted vec

use doe::*;
let v1 = vec_sort!(vec![10, 2, 3]);
assert_eq!(vec![2,3,10],v1);
let v2 = vec_sort!(vec![1.8, 2.5, 0.3]);
assert_eq!(vec![0.3,1.8,2.5],v2);