gistfile1

#!/usr/bin/env ruby

module Loud
  module ClassMethods
    def shout(message)
      loud = if message =~ /!$/
               message.upcase
             else
               message.upcase + '!'
             end
      puts loud
    end
  end

  def self.included(mod)
    mod.extend(ClassMethods)
  end
end

include Loud
shout "Hello, world!"
shout "Um, hello?"