further tweak style and fix indentation

[~bandali/bndl.org] / common / footer.html

<footer>
  <p>
    Copyright (c) 2016&ndash;2019 Amin Bandali<br>
    Verbatim copying and redistribution of this entire page are
    permitted provided this notice is preserved.
  </p>
</footer>
</body>
</html>