{"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"assert_pns_eq_sub!(\"%06d\","}]}
    assert_pns_eq_sub!("%06d",
        { None, "", None, None, None, "s", (0, 2), });
        { None, "0", Some(N::Num(6)), None, None, "d", (0, 4), });