Make Pair.WHICH be consistent in light of .freeze
Make Pair.WHICH be consistent in light of .freeze

This should, at least for now, fix RT #131887 .  Must admit that .freeze
was a bad idea: it is no longer in the core, and I would vote for removal
in 6.d or 6.e, and then revert this patch.

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