title: Instance methods in modules
body: <p>Consider the following code:</p>
  
  <pre><code>module ModName
    def aux
      puts 'aux'
    end
  end
  </code></pre>
  
  <p>If we replace <code>module</code> with <code>class</code>, we can do the following:</p>
  
  <pre><code>ModName.new.aux
  </code></pre>
  
  <p>Modules cannot be instanced, though. Is there a way to call the <code>aux</code> method on the module?</p>