Fix mix() (^) (a=>-42).Mix
Fix mix() (^) (a=>-42).Mix

This would improperly give (a=>-42).Mix, it should give (:42a).Mix.
It now does.

tbrowder/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,softmoth/rakudo,tbrowder/rakudo,rakudo/rakudo,tbrowder/rakudo,softmoth/rakudo,tony-o/rakudo,tony-o/rakudo,usev6/rakudo,tony-o/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,sjn/rakudo,tbrowder/rakudo,usev6/rakudo,raydiak/rakudo,salortiz/rakudo,salortiz/rakudo,lucasbuchala/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,Gnouc/rakudo,softmoth/rakudo,nbrown/rakudo,sjn/rakudo,rakudo/rakudo,salortiz/rakudo,lucasbuchala/rakudo,sjn/rakudo,raydiak/rakudo,usev6/rakudo,nbrown/rakudo,raydiak/rakudo,sjn/rakudo,lucasbuchala/rakudo,awwaiid/rakudo,salortiz/rakudo,MasterDuke17/rakudo,tony-o/rakudo,nbrown/rakudo,tony-o/rakudo,jonathanstowe/rakudo,labster/rakudo,rakudo/rakudo,usev6/rakudo,Gnouc/rakudo,tbrowder/rakudo,jonathanstowe/rakudo,Gnouc/rakudo,awwaiid/rakudo,labster/rakudo,jonathanstowe/rakudo,lucasbuchala/rakudo,Gnouc/rakudo,sjn/rakudo,nbrown/rakudo,jonathanstowe/rakudo,Gnouc/rakudo,labster/rakudo,labster/rakudo,awwaiid/rakudo,nbrown/rakudo,salortiz/rakudo,salortiz/rakudo,labster/rakudo,raydiak/rakudo,tony-o/rakudo,rakudo/rakudo,nbrown/rakudo,tbrowder/rakudo,rakudo/rakudo,usev6/rakudo,labster/rakudo,softmoth/rakudo,jonathanstowe/rakudo,rakudo/rakudo,softmoth/rakudo,lucasbuchala/rakudo