Stop << a b >> flattening into an arg list.
Stop << a b >> flattening into an arg list.

Fixes RT #125995.

jonathanstowe/rakudo,salortiz/rakudo,usev6/rakudo,rakudo/rakudo,nbrown/rakudo,labster/rakudo,tbrowder/rakudo,raydiak/rakudo,MasterDuke17/rakudo,skids/rakudo,samcv/rakudo,azawawi/rakudo,samcv/rakudo,nbrown/rakudo,awwaiid/rakudo,Gnouc/rakudo,labster/rakudo,usev6/rakudo,nunorc/rakudo,tony-o/rakudo,zostay/rakudo,tbrowder/rakudo,usev6/rakudo,ab5tract/rakudo,jonathanstowe/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,paultcochrane/rakudo,ungrim97/rakudo,rakudo/rakudo,tbrowder/rakudo,sjn/rakudo,cognominal/rakudo,salortiz/rakudo,sjn/rakudo,usev6/rakudo,tbrowder/rakudo,ungrim97/rakudo,dankogai/rakudo,nunorc/rakudo,skids/rakudo,ugexe/rakudo,softmoth/rakudo,softmoth/rakudo,cygx/rakudo,tony-o/rakudo,tony-o/rakudo,MasterDuke17/rakudo,LLFourn/rakudo,tony-o/rakudo,ugexe/rakudo,tony-o/rakudo,cygx/rakudo,azawawi/rakudo,samcv/rakudo,lucasbuchala/rakudo,ab5tract/rakudo,softmoth/rakudo,zostay/rakudo,labster/rakudo,Gnouc/rakudo,cygx/rakudo,cognominal/rakudo,cognominal/rakudo,ungrim97/rakudo,lucasbuchala/rakudo,rakudo/rakudo,tbrowder/rakudo,labster/rakudo,cygx/rakudo,b2gills/rakudo,zostay/rakudo,sjn/rakudo,b2gills/rakudo,paultcochrane/rakudo,Gnouc/rakudo,nbrown/rakudo,MasterDuke17/rakudo,nunorc/rakudo,softmoth/rakudo,tony-o/rakudo,raydiak/rakudo,cognominal/rakudo,skids/rakudo,dankogai/rakudo,LLFourn/rakudo,Gnouc/rakudo,b2gills/rakudo,Gnouc/rakudo,rakudo/rakudo,azawawi/rakudo,ugexe/rakudo,softmoth/rakudo,LLFourn/rakudo,ungrim97/rakudo,nbrown/rakudo,ugexe/rakudo,raydiak/rakudo,paultcochrane/rakudo,jonathanstowe/rakudo,salortiz/rakudo,zostay/rakudo,sjn/rakudo,ab5tract/rakudo,lucasbuchala/rakudo,dankogai/rakudo,cognominal/rakudo,nbrown/rakudo,labster/rakudo,Gnouc/rakudo,nunorc/rakudo,awwaiid/rakudo,dankogai/rakudo,awwaiid/rakudo,salortiz/rakudo,skids/rakudo,ab5tract/rakudo,ungrim97/rakudo,salortiz/rakudo,rakudo/rakudo,LLFourn/rakudo,raydiak/rakudo,nbrown/rakudo,azawawi/rakudo,dankogai/rakudo,awwaiid/rakudo,jonathanstowe/rakudo,labster/rakudo,ab5tract/rakudo,awwaiid/rakudo,samcv/rakudo,sjn/rakudo,b2gills/rakudo,samcv/rakudo,usev6/rakudo,rakudo/rakudo,lucasbuchala/rakudo,jonathanstowe/rakudo,b2gills/rakudo,azawawi/rakudo,ugexe/rakudo,paultcochrane/rakudo,tbrowder/rakudo,salortiz/rakudo,skids/rakudo,paultcochrane/rakudo,LLFourn/rakudo,cygx/rakudo