[Checkins] [zopefoundation/transaction] 0f0afb: Be careful about when abort frees its manager.

[Jason Madden]

  Branch: refs/heads/issue82
  Home:   https://github.com/zopefoundation/transaction
  Commit: 0f0afb13ad4e3863b0bf436729e0eaa15a33c200
      https://github.com/zopefoundation/transaction/commit/0f0afb13ad4e3863b0bf436729e0eaa15a33c200
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2019-09-05 (Thu, 05 Sep 2019)

  Changed paths:
    M CHANGES.rst
    M transaction/_transaction.py
    M transaction/tests/test__transaction.py

  Log Message:
  -----------
  Be careful about when abort frees its manager.

This behaves more like older code did.

Also explicitly allow access to Transaction.data() by afterCompletion synchronizers.