includeとprependを使ったメソッド探索

include_prepend.rb

module M1; end

module M2; end

class C
  include M1
  prepend M2
end

a = C.new
a.ancestors #=> [M2, C, M1, Object, PP::ObjectMixin, Kernel, BasicObject]

method_search.rb

module M1
  def hoge
    puts 'M1'
  end
end

module M2
  def hoge
    puts 'M2'
  end
end

class C
  include M1
  prepend M2
end

a = C.new
a.hoge #=> ?