self in a module is the same as self in a class (at the method level)

gistfile1.rb

module IsSelf
  def what_is_self?
    puts "self = #{self.inspect}"
    puts "self's class = #{self.class}"
  end
end

class AClass
  include IsSelf
  def initialize
  end
end

a = AClass.new

a.what_is_self?

# >> self = #<AClass:0x007fd3f190da68>
# >> self's class = AClass