ansible/ansible — pull request #4735 by chrisalbright (2013-10-31 00:27:24+00:00)
Title: pip module: fix unexpected behavior when creating virtualenvs

This module supports `virtualenv_site_packages` as an option to control whether or not to include system packages when installing pip packages into a virtual environment.

The default is no, and when you say yes it explicitly it includes a flag to include site packages, otherwise it doesn't provide a flag.

Some versions of virtualenv by default include site packages and other versions by default do not.

This patch just makes both branches explicit, so `virtualenv_site_packages=no` really means no.