Slightly optimize default Iterator.push-all
Slightly optimize default Iterator.push-all

Fewer calls, and no need to keep a counter as well.

samcv/rakudo,salortiz/rakudo,awwaiid/rakudo,nbrown/rakudo,jonathanstowe/rakudo,sjn/rakudo,nbrown/rakudo,ab5tract/rakudo,MasterDuke17/rakudo,samcv/rakudo,b2gills/rakudo,sjn/rakudo,tony-o/rakudo,ab5tract/rakudo,jonathanstowe/rakudo,tbrowder/rakudo,zostay/rakudo,raydiak/rakudo,Gnouc/rakudo,rakudo/rakudo,MasterDuke17/rakudo,ab5tract/rakudo,lucasbuchala/rakudo,azawawi/rakudo,lucasbuchala/rakudo,azawawi/rakudo,azawawi/rakudo,tony-o/rakudo,usev6/rakudo,zostay/rakudo,b2gills/rakudo,samcv/rakudo,ab5tract/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,ab5tract/rakudo,salortiz/rakudo,nbrown/rakudo,b2gills/rakudo,rakudo/rakudo,sjn/rakudo,usev6/rakudo,softmoth/rakudo,awwaiid/rakudo,labster/rakudo,Gnouc/rakudo,labster/rakudo,raydiak/rakudo,azawawi/rakudo,b2gills/rakudo,awwaiid/rakudo,sjn/rakudo,tbrowder/rakudo,awwaiid/rakudo,jonathanstowe/rakudo,usev6/rakudo,labster/rakudo,nbrown/rakudo,lucasbuchala/rakudo,awwaiid/rakudo,zostay/rakudo,raydiak/rakudo,usev6/rakudo,Gnouc/rakudo,rakudo/rakudo,Gnouc/rakudo,samcv/rakudo,nbrown/rakudo,softmoth/rakudo,tbrowder/rakudo,b2gills/rakudo,salortiz/rakudo,jonathanstowe/rakudo,softmoth/rakudo,lucasbuchala/rakudo,labster/rakudo,tbrowder/rakudo,tony-o/rakudo,salortiz/rakudo,lucasbuchala/rakudo,salortiz/rakudo,rakudo/rakudo,samcv/rakudo,MasterDuke17/rakudo,labster/rakudo,azawawi/rakudo,jonathanstowe/rakudo,raydiak/rakudo,zostay/rakudo,salortiz/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,nbrown/rakudo,softmoth/rakudo,tony-o/rakudo,tony-o/rakudo,rakudo/rakudo,labster/rakudo,rakudo/rakudo,sjn/rakudo,softmoth/rakudo,tony-o/rakudo,usev6/rakudo,Gnouc/rakudo,tbrowder/rakudo