title: Rails shorter "time_ago_in_words"
body: <p>Is there a different time calculation in rails besides "time_ago_in_words"?? I want to be able to use just 'h' for hours 'd' days 'm' for months... ex. 3d, or 4h, or 5m</p>
  
  <p>My code now...</p>
  
  <pre><code>&lt;%= time_ago_in_words(feed_item.created_at) %&gt; ago.
  </code></pre>