{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"assert_pns_eq_sub!(\"%Iu\","}]}
    assert_pns_eq_sub!("%Iu",
        { None, "", None, None, Some("l"), "u", (0, 3), });
        { None, "", None, None, Some("I"), "u", (0, 3), });