[RangeIterator] fix writing to attributes and an off-by-one error
[RangeIterator] fix writing to attributes and an off-by-one error

ab5tract/rakudo,samcv/rakudo,cognominal/rakudo,samcv/rakudo,Gnouc/rakudo,salortiz/rakudo,nbrown/rakudo,salortiz/rakudo,Gnouc/rakudo,sergot/rakudo,ab5tract/rakudo,lucasbuchala/rakudo,salortiz/rakudo,ungrim97/rakudo,rakudo/rakudo,LLFourn/rakudo,raydiak/rakudo,usev6/rakudo,Gnouc/rakudo,LLFourn/rakudo,ungrim97/rakudo,tony-o/deb-rakudodaily,nbrown/rakudo,sjn/rakudo,paultcochrane/rakudo,Leont/rakudo,skids/rakudo,awwaiid/rakudo,pmurias/rakudo,rjbs/rakudo,dankogai/rakudo,tbrowder/rakudo,lucasbuchala/rakudo,ungrim97/rakudo,cygx/rakudo,Leont/rakudo,labster/rakudo,laben/rakudo,zhuomingliang/rakudo,dankogai/rakudo,pmurias/rakudo,dankogai/rakudo,softmoth/rakudo,zostay/rakudo,skids/rakudo,salortiz/rakudo,rakudo/rakudo,MasterDuke17/rakudo,cognominal/rakudo,dankogai/rakudo,sjn/rakudo,zostay/rakudo,Gnouc/rakudo,nbrown/rakudo,cygx/rakudo,ugexe/rakudo,niner/rakudo,tony-o/rakudo,labster/rakudo,ab5tract/rakudo,sjn/rakudo,azawawi/rakudo,sergot/rakudo,rakudo/rakudo,usev6/rakudo,tony-o/rakudo,tony-o/deb-rakudodaily,labster/rakudo,raydiak/rakudo,sjn/rakudo,teodozjan/rakudo,rjbs/rakudo,awwaiid/rakudo,b2gills/rakudo,Gnouc/rakudo,niner/rakudo,retupmoca/rakudo,tony-o/deb-rakudodaily,azawawi/rakudo,skids/rakudo,ugexe/rakudo,zhuomingliang/rakudo,softmoth/rakudo,nbrown/rakudo,usev6/rakudo,teodozjan/rakudo,nunorc/rakudo,ugexe/rakudo,cognominal/rakudo,ungrim97/rakudo,MasterDuke17/rakudo,nunorc/rakudo,tony-o/rakudo,tbrowder/rakudo,b2gills/rakudo,ugexe/rakudo,b2gills/rakudo,laben/rakudo,b2gills/rakudo,zostay/rakudo,dankogai/rakudo,softmoth/rakudo,softmoth/rakudo,labster/rakudo,jonathanstowe/rakudo,dwarring/rakudo,labster/rakudo,pmurias/rakudo,LLFourn/rakudo,tony-o/rakudo,skids/rakudo,lucasbuchala/rakudo,paultcochrane/rakudo,jonathanstowe/rakudo,skids/rakudo,awwaiid/rakudo,teodozjan/rakudo,Gnouc/rakudo,paultcochrane/rakudo,awwaiid/rakudo,sergot/rakudo,salortiz/rakudo,tony-o/deb-rakudodaily,lucasbuchala/rakudo,MasterDuke17/rakudo,jonathanstowe/rakudo,zostay/rakudo,teodozjan/rakudo,pmurias/rakudo,azawawi/rakudo,tbrowder/rakudo,nbrown/rakudo,ungrim97/rakudo,softmoth/rakudo,rakudo/rakudo,jonathanstowe/rakudo,salortiz/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,Leont/rakudo,tony-o/deb-rakudodaily,cygx/rakudo,b2gills/rakudo,ugexe/rakudo,usev6/rakudo,LLFourn/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,zhuomingliang/rakudo,laben/rakudo,cognominal/rakudo,labster/rakudo,rakudo/rakudo,lucasbuchala/rakudo,niner/rakudo,nunorc/rakudo,laben/rakudo,tony-o/rakudo,tony-o/rakudo,rjbs/rakudo,azawawi/rakudo,tony-o/deb-rakudodaily,tony-o/deb-rakudodaily,retupmoca/rakudo,retupmoca/rakudo,ab5tract/rakudo,Leont/rakudo,sergot/rakudo,samcv/rakudo,raydiak/rakudo,dwarring/rakudo,retupmoca/rakudo,rakudo/rakudo,jonathanstowe/rakudo,niner/rakudo,cygx/rakudo,tbrowder/rakudo,awwaiid/rakudo,azawawi/rakudo,paultcochrane/rakudo,zhuomingliang/rakudo,tbrowder/rakudo,samcv/rakudo,usev6/rakudo,ab5tract/rakudo,dwarring/rakudo,dwarring/rakudo,raydiak/rakudo,samcv/rakudo,nbrown/rakudo,sjn/rakudo,cognominal/rakudo,nunorc/rakudo,cygx/rakudo,paultcochrane/rakudo,LLFourn/rakudo