Make sure List.roll always returns a Seq
Make sure List.roll always returns a Seq

and throws Failures rather than potentially masquerading them as a
single element list.

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