Improved wording.

Author: facundobatista

Doc/library/venv.rst

@@ -24,8 +24,8 @@ their :mod:`site` directories.
 A virtual environment is created on top of an existing
 Python installation, known as the virtual environment's "base" Python, and by
 default is isolated from the packages in the base environment,
-so only those explicitly installed in the virtual environment are available.
-See :ref:`sys-path-init-virtual-environments` and :mod:`site`'s
+so that only those explicitly installed in the virtual environment are
+available. See :ref:`sys-path-init-virtual-environments` and :mod:`site`'s
 :ref:`virtual environments documentation <site-virtual-environments-configuration>`
 for more information.