[pypy-dev] 2.x -> 2 lib rename

[Gabriel de Perthuis]

> +1, although to jumpy to the defence of whoever did the commit, it's not
> obvious that such a change breaks virtualenv because there are not
> tests.
> Maybe we should setup a buildbot to run virtualenv's tests with the
> nightly pypy?
> I didn't do that when I added virtualenv support for the simple reason
> that at that time virtualenv had no tests, but maybe the situation
> improved nowadays?

There are unit tests and an integration test that would have caught it,
see https://github.com/pypa/virtualenv/blob/develop/.travis.yml
and https://travis-ci.org/pypa/virtualenv .

Travis doesn't have up to date PyPy nightlies, they were using a PPA
that is lagging behind: https://launchpad.net/~pypy/+archive/ppa