Improve wrong arity error for anonymous subs
Improve wrong arity error for anonymous subs

If the routine doesn't have a name, use '<anon>' instead.

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