title: Parts of markdown code turns green by themselfs
body: <p>I'm coding a page in markdown and some parts of examples in ~~~php example ~~~ turns green without any purpouse. </p>
  
  <p>Example:</p>
  
  <pre><code>    Check out a specific version:
  
  ~~~php
  svn co http://svn.doctrine-project.org/branches/1.2 .
  ~~~
  </code></pre>
  
  <p>Afterwards, the code looks like this:
  <a href="http://i.imgur.com/Pi1NWhZ.png" rel="nofollow">http://i.imgur.com/Pi1NWhZ.png</a></p>
  
  <p>Any idea how to cancel the green color?</p>
  
  <p>Thanks!</p>