==== Source: mod.sol ====
function longdata() pure returns (bytes memory) {
    return
        "xasopca.pngaibngidak.jbtnudak.cAP.BRRSMCPJAGPD KIAJDOMHUKR,SCPID"
        "xasopca.pngaibngidak.jbtnudak.cAP.BRRSMCPJAGPD KIAJDOMHUKR,SCPID"
        "M,SEYBDXCNTKIMNJGO;DUIAQBQUEHAKMPGIDSAJCOUKANJBCUEBKNA.GIAKMV.TI"
        "AJMO<KXBANJCPGUD ABKCJIDHA NKIMAJU,EKAMHSO;PYCAKUM,L.UCA MR;KITA"
        "M,SEYBDXCNTKIMNJGO;DUIAQBQUEHAKMPGIDSAJCOUKANJBCUEBKNA.GIAKMV.TI"
        "AJMO<KXBANJCPGUD ABKCJIDHA NKIMAJU,EKAMHSO;PYCAKUM,L.UCA MR;KITA"
        " .RPOKIDAS,.CKUMT.,ORKAD ,NOKIDHA .CGKIAD OVHAMS CUAOGT DAKN OIT"
        "xasopca.pngaibngidak.jbtnudak.cAP.BRRSMCPJAGPD KIAJDOMHUKR,SCPID"
        "M,SEYBDXCNTKIMNJGO;DUIAQBQUEHAKMPGIDSAJCOUKANJBCUEBKNA.GIAKMV.TI"
        "AJMO<KXBANJCPGUD ABKCJIDHA NKIMAJU,EKAMHSO;PYCAKUM,L.UCA MR;KITA"
        "apibakrpidbacnidkacjadtnpdkylca.,jda,r.kuadc,jdlkjd',c'dj, ncg d"
        "anosumantkudkc,djntudkantuadnc,ui,c.ud,.nujdncud,j.rsch'pkl.'pih";
}
==== Source: main.sol ====
import "mod.sol" as M;

contract C {
    bytes data;
    function () pure returns (bytes memory) f;
    constructor() {
        data = M.longdata();
        f = M.longdata;
    }
    function test() public view returns (bool) {
        return keccak256(data) == keccak256(f());
    }
}
// ----
// test() -> true