[Checkins] [zopefoundation/Zope] 8f47ec: Update Zope version (#500)

[Jürgen Gmach]

  Branch: refs/heads/2.13
  Home:   https://github.com/zopefoundation/Zope
  Commit: 8f47ec71acc372dedcd7c9398c141f648fc53609
      https://github.com/zopefoundation/Zope/commit/8f47ec71acc372dedcd7c9398c141f648fc53609
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2019-02-13 (Wed, 13 Feb 2019)

  Changed paths:
    M doc/INSTALL-virtualenv.rst

  Log Message:
  -----------
  Update Zope version (#500)