title: Use of abbr_month_names (and similars) with I18n.l()
body: <p>I'm switching to rails and it becomes sometimes a bit strange. After installing a es.yml file I am trying to output a DATETIME column of my database. If I do this:</p>
  
  <pre><code>= l(a.created_at, :format =&gt; :short)
  </code></pre>
  
  <p>It's ok. It prints a nice date in spanish format. But I am confuse about using <strong>abbr_month_names</strong> in this way. I have tried in a lot of different ways —believe me, I am around four hours with this issue— but I coudn't find a way to output just the month name in short —lets say "OCT.</p>
  
  <p>I had a look on much sites about i18n and date formats, but articles ends always with the :format => :short example and doesn't cares about other ways to display dates (well, someone also explain how to use the :long format...)</p>