title: updating emacs on OSX
body: <p>I tried updating my emacs (22.1) to a newer version with this command:</p>
  
  <pre><code> $ sudo port -u upgrade emacs
  Warning: port definitions are more than two weeks old, consider using selfupdate
  ---&gt;  Scanning binaries for linking errors: 100.0%
  ---&gt;  No broken files found.
  </code></pre>
  
  <p>and now <code>emacs --version</code> still returns '22', obviously meaning it has not been updated.</p>
  
  <p>How do I fix this?</p>