[Checkins] [zopefoundation/Products.ZCatalog] c4b1a6: Fix linting issues

[Jürgen Gmach]

  Branch: refs/heads/fix-lint
  Home:   https://github.com/zopefoundation/Products.ZCatalog
  Commit: c4b1a6b62b38d14d813227e7f1bfdc1233586fd2
      https://github.com/zopefoundation/Products.ZCatalog/commit/c4b1a6b62b38d14d813227e7f1bfdc1233586fd2
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2020-05-19 (Tue, 19 May 2020)

  Changed paths:
    M src/Products/PluginIndexes/CompositeIndex/tests/testCompositeIndex.py
    M src/Products/ZCTextIndex/BaseIndex.py
    M src/Products/ZCTextIndex/RiceCode.py
    M src/Products/ZCatalog/ZCatalog.py

  Log Message:
  -----------
  Fix linting issues

... which came with the new flake8 version.

modified:   src/Products/PluginIndexes/CompositeIndex/tests/testCompositeIndex.py
modified:   src/Products/ZCTextIndex/BaseIndex.py
modified:   src/Products/ZCTextIndex/RiceCode.py
modified:   src/Products/ZCatalog/ZCatalog.py