[Checkins] [zopefoundation/DocumentTemplate] 44c789: better `Exception` detection

[Dieter Maurer]

  Branch: refs/heads/fix-Zope-#921
  Home:   https://github.com/zopefoundation/DocumentTemplate
  Commit: 44c78928d796c0b7b166f315ea1b0fbaf0cacb07
      https://github.com/zopefoundation/DocumentTemplate/commit/44c78928d796c0b7b166f315ea1b0fbaf0cacb07
  Author: dieter <dieter at handshake.de>
  Date:   2020-10-26 (Mon, 26 Oct 2020)

  Changed paths:
    M src/DocumentTemplate/ustr.py

  Log Message:
  -----------
  better `Exception` detection