# File lib/rdoc/rd/block_parser.rb, line 397
def add_footnote content
  index = @footnotes.length + 1

  footmark_link = "{^#{index}}[rdoc-label:footmark-#{index}:foottext-#{index}]"

  @footnotes << RDoc::Markup::Paragraph.new(footmark_link, *content)

  index
end