[Checkins] [zopefoundation/Products.StandardCacheManagers] 05ef2f: Restore `check-only` flag for `isort`

[Jürgen Gmach]

  Branch: refs/heads/fix-build
  Home:   https://github.com/zopefoundation/Products.StandardCacheManagers
  Commit: 05ef2f59348042abb18fe710c30d5baa541b0178
      https://github.com/zopefoundation/Products.StandardCacheManagers/commit/05ef2f59348042abb18fe710c30d5baa541b0178
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2020-10-08 (Thu, 08 Oct 2020)

  Changed paths:
    M tox.ini

  Log Message:
  -----------
  Restore `check-only` flag for `isort`

modified:   tox.ini