Function fmt_debug

cranelift/entity/src/set.rs:312–318

()

    #[test]
    fn fmt_debug() {
        let mut s = EntitySet::new();
        s.insert(E(2));
        s.insert(E(4));
        // The `Debug` formatting should only show the elements within the set.
        assert_eq!(format!("{s:?}"), "{E(2), E(4)}");
    }
}