{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"assert_pns_eq_sub!(\"%#x\","}]}
    assert_pns_eq_sub!("%#x",
        { None, "", Some(N::Num(4)), Some(N::Num(2)), None, "f", (0, 5), });
        { None, "#", None, None, None, "x", (0, 3), });