title: html.haml vs haml in Rails view templates
body: <p>What is the difference between using view templates in Rails as '.html.haml' and as simply '.haml'?
  For example,<br>
  <code>show.html.haml</code><br>
  vs<br>
  <code>show.haml</code>  </p>
  
  <p>Are there any particular advantages of using one over the other? Or is one of them a standard practice? The same question goes for other types of templates as well, like '.erb'.</p>