title: Reverse for 'code_front' with arguments '()' and keyword arguments '{'category_slug': u'code'}' not found
body: <p>I'm getting the following error message:</p>
  
  <pre>Reverse for 'code_front' with arguments '()' and keyword arguments '{'category_slug': u'code'}' not found.</pre>
  
  <p>I am new at this, please help.</p>