title: What does printing an empty line do?
body: <p>I know this question may well be the silliest question you've heard today, but to me it is a big question at this stage of my programming learning.</p>
  
  <p>Why is the second empty line needed in this Python code? What does that line do?</p>
  
  <pre><code>print 'Content-Type: text/plain'
  print ''
  print 'Hello, world!'
  </code></pre>