{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"assert_eq!(v3a.cmp(&v3b),"}]}
    assert_eq!(v3a.cmp(&v3b), Ordering::Equal); // only uses Interned::eq, not S::cmp
    assert_eq!(v1.cmp(&v1), Ordering::Equal); // only uses Interned::eq, not S::cmp