Simplify some iterators
Simplify some iterators

MasterDuke17/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,softmoth/rakudo,nbrown/rakudo,Gnouc/rakudo,nbrown/rakudo,rakudo/rakudo,labster/rakudo,softmoth/rakudo,MasterDuke17/rakudo,rakudo/rakudo,labster/rakudo,tony-o/rakudo,tony-o/rakudo,salortiz/rakudo,labster/rakudo,tbrowder/rakudo,tony-o/rakudo,labster/rakudo,salortiz/rakudo,nbrown/rakudo,salortiz/rakudo,softmoth/rakudo,Gnouc/rakudo,rakudo/rakudo,softmoth/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,tony-o/rakudo,tbrowder/rakudo,rakudo/rakudo,tony-o/rakudo,softmoth/rakudo,Gnouc/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,nbrown/rakudo,nbrown/rakudo,nbrown/rakudo,Gnouc/rakudo,salortiz/rakudo,labster/rakudo,MasterDuke17/rakudo,tony-o/rakudo,tbrowder/rakudo,rakudo/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,salortiz/rakudo,labster/rakudo,tbrowder/rakudo