Tweak Str.index to be slightly more-correct, also fixing Str.split(Str)
Tweak Str.index to be slightly more-correct, also fixing Str.split(Str)

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