Allow spaces in rootdir when running tests

[moredatarequired]

Small change to allow tests to pass when run from a directory that has spaces in the path.

Because I'm running from Ubuntu under Windows (WSL), my home directory is /mnt/c/Users/Wimberly Hugh and so when I try to run the project tests I run into the test failure:

add_to_index = <function add_to_index.<locals>.add_package at 0x7f1edda07158>

    def test_build_from_sdist(add_to_index):
        sdist_fname = os.path.join(here, "copyingmock-0.2.tar.gz")
        fragment = "#md5=9aa6ba13542d25e527fe358d53cdaf3b"
        add_to_index(name="copyingmock", path=sdist_fname, urlfragment=fragment)
        dist = JohnnyDist("copyingmock")
        assert dist.name == "copyingmock"
        assert dist.summary == "A subclass of MagicMock that copies the arguments"
        assert dist.required_by == []
        assert dist.import_names == ["copyingmock"]
        assert dist.homepage == "https://github.com/wimglenn/copyingmock"
        assert dist.extras_available == []
        assert dist.extras_requested == []
        assert dist.project_name == "copyingmock"
>       assert dist.download_link == "file://{}".format(sdist_fname)
E       AssertionError: assert 'file:///mnt/...ck-0.2.tar.gz' == 'file:///mnt/c...ck-0.2.tar.gz'
E         - file:///mnt/c/Users/Wimberly%20Hugh/git_repos/johnnydep/tests/copyingmock-0.2.tar.gz
E         ?                             ^^^
E         + file:///mnt/c/Users/Wimberly Hugh/git_repos/johnnydep/tests/copyingmock-0.2.tar.gz
E         ?                             ^

tests/test_gen.py:71: AssertionError

[wimglenn]

Hi @moredatarequired - this proj supports Python 2.7 as well. Please put cross-compat shims into johnnydep/compat.py for the url quoting.

[wimglenn]

thanks for the contribution!