fix flake8-docstrings

Author: jlwalke2

tox.ini

@@ -38,12 +38,13 @@ basepython =
 
 deps =
     clean: coverage
-    flake8: flake8==3.7.7
+    flake8: flake8 == 3.7.7
     flake8: flake8-bugbear
     flake8: flake8-docstrings
     flake8: flake8-rst-docstrings
     flake8: flake8-import-order
     flake8: flake8-logging-format
+    flake8: pydocstyle < 4.0.0      # Issue with flake8-docstings  https://github.com/PyCQA/pydocstyle/issues/375
     tests: pytest >= 4.4.1
     tests: pytest-cov
     tests: betamax >= 0.8.1