Fix chaining syntax.

Author: aerostitch

tox.ini

@@ -17,7 +17,7 @@ commands =
     django_is_installed: pylint --load-plugins=pylint_django setup.py
     flake8: flake8
     pylint: pylint --rcfile=tox.ini -d missing-docstring,too-many-branches,too-many-return-statements,too-many-ancestors,fixme --ignore=tests pylint_django setup
-    readme: python setup.py -q sdist && twine check dist/*
+    readme: bash -c \'python setup.py -q sdist && twine check dist/*\'
     py{36}-django{111,20,-master}: coverage run pylint_django/tests/test_func.py -v
     py{35,36,37}-django21: coverage run pylint_django/tests/test_func.py -v
     clean: find . -type f -name '*.pyc' -delete
@@ -40,6 +40,7 @@ setenv =
     PYTHONPATH = .
 whitelist_externals =
     django_not_installed: bash
+    readme: bash
     clean: find
     clean: rm