class Kramdown::Converter::Html

def footnote_content
  ol = Element.new(:ol)
  ol.attr['start'] = @footnote_start if @footnote_start != 1
  i = 0
  backlink_text = escape_html(@options[:footnote_backlink], :text)
  while i < @footnotes.length
    name, data, _, repeat = *@footnotes[i]
    li = Element.new(:li, nil, 'id' => "fn:#{name}")
    li.children = Marshal.load(Marshal.dump(data.children))
    para = nil
    if li.children.last.type == :p || @options[:footnote_backlink_inline]
      parent = li
      while !parent.children.empty? && ![:p, :header].include?(parent.children.last.type)
        parent = parent.children.last
      end
      para = parent.children.last
      insert_space = true
    end
    unless para
      li.children << (para = Element.new(:p))
      insert_space = false
    end
    unless @options[:footnote_backlink].empty?
      nbsp = entity_to_str(ENTITY_NBSP)
      value = sprintf(FOOTNOTE_BACKLINK_FMT, (insert_space ? nbsp : ''), name, backlink_text)
      para.children << Element.new(:raw, value)
      (1..repeat).each do |index|
        value = sprintf(FOOTNOTE_BACKLINK_FMT, nbsp, "#{name}:#{index}",
                        "#{backlink_text}<sup>#{index + 1}</sup>")
        para.children << Element.new(:raw, value)
      end
    end
    ol.children << Element.new(:raw, convert(li, 4))
    i += 1
  end
  if ol.children.empty?
    ''
  else
    format_as_indented_block_html('div', {class: "footnotes"}, convert(ol, 2), 0)
  end
end