[Checkins] [zopefoundation/Products.ZCatalog] 7f246b: Fix flake8

[Andreas Gabriel]

  Branch: refs/heads/notindexed_value_support
  Home:   https://github.com/zopefoundation/Products.ZCatalog
  Commit: 7f246bee759d46bc1319490c80d1d97b1b4fc928
      https://github.com/zopefoundation/Products.ZCatalog/commit/7f246bee759d46bc1319490c80d1d97b1b4fc928
  Author: Andreas Gabriel <gabriel at hrz.uni-marburg.de>
  Date:   2019-05-08 (Wed, 08 May 2019)

  Changed paths:
    M src/Products/PluginIndexes/tests/test_unindex.py

  Log Message:
  -----------
  Fix flake8