{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
    let (t, r) = parse_any_link(simple.as_bytes(), false).unwrap();
    let simple = "[see here](docs.rs) other";
    assert_eq!(t, MdTree::Link { disp: "see here", link: "docs.rs" });