Merge pull request #650 from ak9999/venv-section-in-current-tutorial-…

…excludes-Windows-393

Moved language around, adding how to activate a venv on Windows

source/tutorials/installing-packages.rst

@@ -212,13 +212,21 @@ Using :ref:`virtualenv`:
 
 For more information, see the `venv`_ docs or the `virtualenv <http://virtualenv.pypa.io>`_ docs.
 
-In both of the above cases, Windows users should _not_ use the
-`source` command, but should rather run the `activate` script directly
-from the command shell. The use of `source` under Unix shells ensures
+The use of `source` under Unix shells ensures
 that the virtual environment's variables are set within the current
 shell, and not in a subprocess (which then disappears, having no
 useful effect).
 
+In both of the above cases, Windows users should _not_ use the
+`source` command, but should rather run the `activate` script directly
+from the command shell like so:
+
+::
+
+ <DIR>\Scripts\activate
+
+
+
 Managing multiple virtual environments directly can become tedious, so the
 :ref:`dependency management tutorial <managing-dependencies>` introduces a
 higher level tool, :ref:`Pipenv`, that automatically manages a separate