docs: def highlight_block(context, nodelist, lexer, **kwargs):
      """
      Code is nodelist ``rendered`` in ``context``
      Returns highlighted code ``div`` tag from ``HtmlFormatter``
      Lexer is guessed by ``lexer`` name
      arguments are passed into the formatter
  
          Syntax::
  
              {% highlight_block [lexer name] [formatter options] %}
                  ... source code ..
              {% endhighlight_block %}
  
          Example::
  
              {% highlight_block python linenos=true %}
                  print '{{ request.path }}'
              {% endhighlight_block %}
      """
      if highlighter is None:
          return '<pre>%s</pre>' % str(nodelist.render(context) or '')
      return highlighter(nodelist.render(context) or '', get_lexer_by_name(lexer), HtmlFormatter(**kwargs))