From: Todd Corenson <todd@...>
Date: 2007-11-06T07:38:01+09:00
Subject: Superclass of a module

In Ruby 1.8, a Module does not have a superclass according to the
superclass and ancestors methods.

E.g.,

module Foo
end

Foo.ancestors # => [Foo]
Foo.superclass # => NoMethodError

Yet,

module Foo
  self.append_features(b)
    super
  end
end

works when append_features is called either directly or when Foo is
included in a class.  That is, super finds a superclass where
append_features is defined.  According to the docs this class is Module.
Is this where append_features is actually defined?  And if user-defined
modules have superclasses, why don't the superclass and ancestors
methods report this class?
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