dev-m1-macbook

in rust edition 2021, fourth-peek test code shows `list` does not live long enough

3

the following code errors with `list` does not live long enough error in rust 2021 edition ```rust #[test] fn peek() { let mut list = List::new(); assert!(list.peek_front().is_none()); list.push_front(1); list.push_front(2); list.push_front(3);...