code: def _status(self):
          
          text = ""
          # Turns out that is related field in null, Django
          # doesn't even make it a property of the object
          # http://code.djangoproject.com/ticket/11920
          if hasattr(self, "reverts"):
              text += '(reverts <a href="%s">%s</a>)<br/>' % (
                  self.reverts.get_absolute_url(),
                  self.reverts.id
              )
          if self.reverted:
              text += '(reverted in <a href="%s">%s</a>)<br/>' % (
                  self.reverted.get_absolute_url(),
                  self.reverted.id
              )
          return text
docs: Return html saying whether this Action is reverted by another
          one or reverts another one.