gistfile1.txt

irb(main):001:0> module Dog
irb(main):002:1> def bark
irb(main):003:2> puts 'woof'
irb(main):004:2> end
irb(main):005:1> end
=> :bark
irb(main):006:0> module Yanik
irb(main):007:1> include Dog
irb(main):008:1> end
=> Yanik