[Checkins] [zopefoundation/transaction] 56010c: elementary implementation of `TransactionManager.r...

[Dieter Maurer]

  Branch: refs/heads/fix_tm_run#58
  Home:   https://github.com/zopefoundation/transaction
  Commit: 56010c6456f5bdc5a80d97aeb723d427d1faa4e2
      https://github.com/zopefoundation/transaction/commit/56010c6456f5bdc5a80d97aeb723d427d1faa4e2
  Author: dieter <dieter at handshake.de>
  Date:   2019-05-03 (Fri, 03 May 2019)

  Changed paths:
    M transaction/_manager.py
    M transaction/interfaces.py
    M transaction/tests/test__manager.py

  Log Message:
  -----------
  elementary implementation of `TransactionManager.run` (i.e.  without `attempts`);
document that a transaction manager supports the "context manager" protocol;
improve formatting (thanks to Marius Gedminas)