Describe Then Grow

100 points

Following code doesn't compile. Fix errors.

Required signature

pub fn describe_then_grow(v: &mut Vec<i32>, new_value: i32) -> String

Visible tests

describes_then_grows

#[test]
fn describes_then_grows() {
    let mut v = vec![10, 20, 30];
    let msg = describe_then_grow(&mut v, 99);
    assert_eq!(msg, "first was 10, now 4 elements");
    assert_eq!(v, vec![10, 20, 30, 99]);
}

Describe Then Grow

Required signature

Visible tests

Your solution