title: How do I include a haml file in haml?
body: <p>How do I include a haml file in haml? It isn't described in the docs.
  (<a href="https://stackoverflow.com/questions/5436769/partial-haml-templating-in-ruby-without-rails">This question</a> talks about inserting parameterized templates but that isn't what I'm looking for.)</p>
  
  <p>I'm using Sinatra but I should hope it doesn't matter.</p>
  
  <p>Is inserting plain HTML any easier?</p>