docs: def get_mathjax_header(https=False):
      """
      Return the snippet of HTML code to put in HTML HEAD tag, in order to
      enable MathJax support.
      @param https: when using the CDN, whether to use the HTTPS URL rather
          than the HTTP one.
      @type https: bool
      @note: with new releases of MathJax, update this function toghether with
             $MJV variable in the root Makefile.am
      """
      if cfg['CFG_MATHJAX_HOSTING'].lower() == 'cdn':
          if https:
              mathjax_path = "https://d3eoax9i5htok0.cloudfront.net/mathjax/2.1-latest"
          else:
              mathjax_path = "http://cdn.mathjax.org/mathjax/2.1-latest"
      else:
          mathjax_path = "/vendors/MathJax"
  
      if cfg['CFG_MATHJAX_RENDERS_MATHML']:
          mathjax_config = "TeX-AMS-MML_HTMLorMML"
      else:
          mathjax_config = "TeX-AMS_HTML"
  
      return """<script type="text/x-mathjax-config">
  MathJax.Hub.Config({
    tex2jax: {inlineMath: [['$','$']],
              processEscapes: true},
    showProcessingMessages: false,
    messageStyle: "none"
  });
  </script>
  <script src="%(mathjax_path)s/MathJax.js?config=%(mathjax_config)s" type="text/javascript">
  </script>""" % {
          'mathjax_path': mathjax_path,
          'mathjax_config': mathjax_config,
      }