{"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"assert_pns_eq_sub!(\"%-10.*s\","}]}
    assert_pns_eq_sub!("%-10.*s",
        { None, "", Some(N::Next), None, None, "s", (0, 3), });
        { None, "-", Some(N::Num(10)), Some(N::Next), None, "s", (0, 7), });