{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"assert_pns_eq_sub!(\"%+i\","}]}
    assert_pns_eq_sub!("%+i",
        { None, "", None, Some(N::Num(6)), None, "i", (0, 4), });
        { None, "+", None, None, None, "i", (0, 3), });