Fix linting errors

Author: matthiask

example/README.rst

@@ -13,7 +13,8 @@ interfere with common JavaScript frameworks.
 How to
 ------
 
-The example project requires a working installation of Django and a few other packages::
+The example project requires a working installation of Django and a few other
+packages::
 
  $ python -m pip install -r requirements_dev.txt