docs: def _is_toc_changed(self, toc_file):
          '''
          Test if the *.toc file has changed during
          the first latex run.
          '''
          fname = '%s.toc' % self.project_name
          if os.path.isfile(fname):
              with open(fname) as fobj:
                  if fobj.read() != toc_file:
                      return True