slightly optimize IO::Handle.lines
slightly optimize IO::Handle.lines

We do not need to check for the limit when it is Inf. Also use .DEFINITE
instead of .defined, which delegates directly to p6definite.

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