#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(trim_prefix_suffix)]
fn main() {
    assert_eq!("foo:bar".trim_prefix("foo:"), "bar");
    assert_eq!("foofoo".trim_prefix("foo"), "foo");
    assert_eq!("foo:bar".trim_prefix("bar"), "foo:bar");
    assert_eq!(
        "<https://example.com/>".trim_prefix('<').trim_suffix('>'),
        "https://example.com/"
    );
}