[Checkins] [zopefoundation/Zope] bb4ffe: `IZopeAwareEngine` to address #864 (#869)

[Dieter Maurer]

  Branch: refs/heads/4.x
  Home:   https://github.com/zopefoundation/Zope
  Commit: bb4ffe3a1b933ff0cbb90b416aa114ec8a978b5d
      https://github.com/zopefoundation/Zope/commit/bb4ffe3a1b933ff0cbb90b416aa114ec8a978b5d
  Author: Dieter Maurer <d-maurer at users.noreply.github.com>
  Date:   2020-07-08 (Wed, 08 Jul 2020)

  Changed paths:
    M CHANGES.rst
    M src/Products/PageTemplates/Expressions.py
    M src/Products/PageTemplates/engine.py
    M src/Products/PageTemplates/expression.py
    M src/Products/PageTemplates/interfaces.py
    A src/Products/PageTemplates/tests/testZopeAwareEngine.py

  Log Message:
  -----------
  `IZopeAwareEngine` to address #864 (#869)

* `IZopeAwareEngine` to address #864

* - fix import sorting

Co-authored-by: Jens Vagelpohl <jens at netz.ooo>