Don't parse <sigil> <rxstopper> as a variable in the search pattern for s///.
Don't parse <sigil> <rxstopper> as a variable in the search pattern for s///.

This fixes RT #122349.

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