{"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"assert_pns_eq_sub!(\"%-10s\","}]}
    assert_pns_eq_sub!("%-10s",
        { None, "#", None, None, None, "x", (0, 3), });
        { None, "-", Some(N::Num(10)), None, None, "s", (0, 5), });