Log Message:
Updated py-test-cov to 2.4.0.

2.4.0 (2016-10-10)
------------------

* Added a "disarm" option: ``--no-cov``. It will disable coverage \ 
measurements. Contributed by Zoltan Kozma in
  `PR#135 <https://github.com/pytest-dev/pytest-cov/pull/135>`_.

  **WARNING: Do not put this in your configuration files, it's meant to be an \ 
one-off for situations where you want to
  disable coverage from command line.**
* Fixed broken exception handling on ``.pth`` file. See `#136 \ 
<https://github.com/pytest-dev/pytest-cov/issues/136>`_.