Give Empty its own .perl output
Give Empty its own .perl output

- for easier debugging
- for faster .perl output for Empty
- and yes, it roundtrips ok

This breaks two spectests that were specifically checking for .perl
returning "slip()".  I consider those tests to be sub-optimal  :-)

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