Pick the Shorter Slice

100 points

Implement shorter, which returns whichever of two string slices has fewer bytes. If tie; return b.

Required signature

pub fn shorter<'a>(a: &'a str, b: &'a str) -> &'a str

returns_the_shorter_one

#[test]
fn returns_the_shorter_one() {
    assert_eq!(shorter("hi", "hello"), "hi");
}