[Checkins] [zopefoundation/DocumentTemplate] 320545: Fix linting issues

[Jürgen Gmach]

  Branch: refs/heads/fix-lint
  Home:   https://github.com/zopefoundation/DocumentTemplate
  Commit: 32054585562b3df7110a204ab6608ba14e8de7e3
      https://github.com/zopefoundation/DocumentTemplate/commit/32054585562b3df7110a204ab6608ba14e8de7e3
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2020-05-15 (Fri, 15 May 2020)

  Changed paths:
    M src/DocumentTemplate/DT_HTML.py
    M tox.ini

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

... which arise with new flake8 version.

modified:   src/DocumentTemplate/DT_HTML.py
modified:   tox.ini