[Checkins] [zopefoundation/zope.interface] c49e8b: add example

[Dieter Maurer]

  Branch: refs/heads/doc_persistency_equality#218
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: c49e8b27b6769904ae3bfc779bb4565edcc7053a
      https://github.com/zopefoundation/zope.interface/commit/c49e8b27b6769904ae3bfc779bb4565edcc7053a
  Author: dieter <dieter at handshake.de>
  Date:   2020-10-19 (Mon, 19 Oct 2020)

  Changed paths:
    M docs/README.rst

  Log Message:
  -----------
  add example