# File lib/cheat/site.rb, line 283
  def diff
    @page_title = @sheet.title
    @sheet_title = @sheet.title
    pre.sheet { color_diff(h(@diffed)) if @diffed }
    div.version {
      text ". o 0 ("
      if @old_sheet.version > 1
        a "diff previous", :href => R(Diff, @sheet.title, @old_sheet.version - 1)
        text " | "
      end
      a "history", :href => R(History, @sheet.title)
      text " | "
      a "current", :href => R(Show, @sheet.title)
      text " )"
    }
  end