{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
    let txt = TXT.replace("-\n", "-").replace("_\n", "_").replace('\n', " ").replace("    ", "");
    let mut buf = BufWriter::new(Vec::new());
    write_wrapping(&mut buf, &txt, 0, None).unwrap();