title: How to set content type as plain/text in padrino?
body: <p>I want to return a string in response with content type as plain/text. This is what I am doing currently.</p>
  
  <pre><code> get :index, :map =&gt; "/ivr", :provides =&gt; [:plain]  do
     "Hello World!"
   end
  </code></pre>
  
  <p>It says ;</p>
  
  <pre><code>RuntimeError - Unknown media type: :plain:
  </code></pre>