# File lib/rd/rd2html-lib.rb, line 382
    def apply_to_Foottext(element, content)
      num = get_footnote_num(element)
      raise ArgumentError, "[BUG] #{element} isn't registered." unless num
      anchor = a_name("foottext", num)
      href = a_name("footmark", num)
      content = content.join("")
      %|<a name="#{anchor}" id="#{anchor}" href="##{href}">|+
        %|<sup><small>*#{num}</small></sup></a>| +
        %|<small>#{content}</small><br />|
    end