{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
    let (t, r) = parse_any_link(simple_toplevel.as_bytes(), true).unwrap();
    let simple_toplevel = "[see here](docs.rs) other";
    assert_eq!(t, MdTree::Link { disp: "see here", link: "docs.rs" });