Fix Seq.Perl for containerized Seqs
Fix Seq.Perl for containerized Seqs

If a Seq is containerized, it won't `flat`ten, so we need to
preserve this property when roundtripping through .perl.

rakudo/rakudo,Gnouc/rakudo,nbrown/rakudo,raydiak/rakudo,nbrown/rakudo,tony-o/rakudo,Gnouc/rakudo,nbrown/rakudo,labster/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,lucasbuchala/rakudo,salortiz/rakudo,awwaiid/rakudo,raydiak/rakudo,rakudo/rakudo,tbrowder/rakudo,sjn/rakudo,tony-o/rakudo,sjn/rakudo,MasterDuke17/rakudo,labster/rakudo,sjn/rakudo,salortiz/rakudo,tbrowder/rakudo,tony-o/rakudo,lucasbuchala/rakudo,awwaiid/rakudo,softmoth/rakudo,tony-o/rakudo,usev6/rakudo,Gnouc/rakudo,rakudo/rakudo,labster/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,nbrown/rakudo,jonathanstowe/rakudo,softmoth/rakudo,nbrown/rakudo,raydiak/rakudo,rakudo/rakudo,salortiz/rakudo,lucasbuchala/rakudo,jonathanstowe/rakudo,tony-o/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,softmoth/rakudo,rakudo/rakudo,lucasbuchala/rakudo,usev6/rakudo,labster/rakudo,awwaiid/rakudo,rakudo/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,raydiak/rakudo,MasterDuke17/rakudo,salortiz/rakudo,tbrowder/rakudo,salortiz/rakudo,usev6/rakudo,tony-o/rakudo,tbrowder/rakudo,lucasbuchala/rakudo,tbrowder/rakudo,usev6/rakudo,MasterDuke17/rakudo,nbrown/rakudo,usev6/rakudo,labster/rakudo,sjn/rakudo,awwaiid/rakudo,sjn/rakudo,labster/rakudo,Gnouc/rakudo,jonathanstowe/rakudo,softmoth/rakudo,salortiz/rakudo,softmoth/rakudo