class Kramdown::Converter::Html

def convert_root(el, indent, opts)
  result = inner(el, indent, opts)
  result << footnote_content
  if @toc_code
    toc_tree = generate_toc_tree(@toc, @toc_code.first)
    text = if toc_tree.children.size > 0
             convert(toc_tree, 0)
           else
             ''
           end
    result.sub!(/#{@toc_code.last}/, text)
  end
  result
end