# File tutorial/build_docs.rb, line 20
  def output()
    yield "<table border='#{@border}' \n"                          + 
          "       cellpadding='#{@cellpad}' \n"                    + 
          "       width='#{@width}'>\n"                            + 
          "  <tr>\n"                                               +
          "    <td width='#{@td_width}' \n"                        + 
          "        bgcolor='#{@title_bgcolor}' \n"                 +
          "        class='fig-title'> \n"                          +
          "      <a name='fig_#{figure}'>\n"                       + 
          "        <b>Figure #{@figure}: #{title}</b>\n"           +
          "      </a>\n"                                           +
          "    </td>\n"                                            +
          "  </tr>\n"                                              +
          "  <tr>\n"                                               +
          "    <td width='#{@td_width}' \n"                        + 
          "        bgcolor='#{@text_bgcolor}' \n"                  +
          "        class='fig-text'> \n"                           +
          "      <pre>\n\n"

    File.open(@example_file) { |file|
      i = 0
      file.each { |line|
        i += 1
        yield sprintf('<a name=\'fig_%s-line_%s\'>% 3s</a>. %s',
                      @figure, i, i, line)
      }
    }

    yield "      </pre>\n"                                         +
          "    </td>\n"                                            +
          "  </tr>\n"                                              +
          "  <tr>\n"                                               +
          "    <td width='#{@td_width}' \n"                        + 
          "        bgcolor='#{@footer_bgcolor}'  \n"               +
          "        class='fig-footer'> \n"                         +
          "      [ <a href='#{@example_file}' \n"                  + 
          "           class='fig-footer-link'>Download</a> ] \n"   +
          "      [ <a href='#{@example_output}' \n"                + 
          "           class='fig-footer-link'>Output</a> ] \n"     +
          "    </td>\n"                                            +
          "  </tr>\n"                                              +
          "</table>\n"
  end