Correct all methods' signatures in Metamodel::EnumHOW's page
Correct all methods' signatures in Metamodel::EnumHOW's page

None of its methods actually specify what type the object the method is
called on must be.

MasterDuke17/doc,MasterDuke17/doc,perl6/doc,perl6/doc,MasterDuke17/doc,tbrowder/doc,perl6/doc,perl6/doc,MasterDuke17/doc,tbrowder/doc,tbrowder/doc,perl6/doc,tbrowder/doc