Make List.rotor more robust and lazy
Make List.rotor more robust and lazy

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