title: Python/Matplotlib - x tick label formatted into multiple columns?
body: <p>Is it possible to take:</p>
  
  <pre><code>hello world 12345
  </code></pre>
  
  <p>as an x-tick label (already being displayed vertically) and turn it into this:</p>
  
  <pre><code>hello world
  12345
  </code></pre>
  
  <p>which is an x-tick label with (rotated) two columns?</p>