{"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"assert_pns_eq_sub!(\"%4.2f\","}]}
    assert_pns_eq_sub!("%4.2f",
        { None, "0", Some(N::Num(6)), None, None, "d", (0, 4), });
        { None, "", Some(N::Num(4)), Some(N::Num(2)), None, "f", (0, 5), });