remove trailing whitespace

remove trailing whitespace

Author: glennglazer

Doc/tutorial/venv.rst

@@ -88,9 +88,9 @@ For example:
   '~/envs/tutorial-env/lib/python3.5/site-packages']
   >>>
 
-Note that the activated virtual environment does not alter the ``PYTHONPATH`` variable in any way. 
-This may lead to unexpected results if the path includes references to code which is incompatible with 
-the Python version the virtual environment is using. The best practice is to ``unset PYTHONPATH`` 
+Note that the activated virtual environment does not alter the ``PYTHONPATH`` variable in any way.
+This may lead to unexpected results if the path includes references to code which is incompatible with
+the Python version the virtual environment is using. The best practice is to ``unset PYTHONPATH``
 in bash or the equivalent for the shell you are using.
 
 To deactivate a virtual environment, type::