Documentation incorrectly states that pytest-cov overrides data_file

[JonathanRRogers]

Summary

In the Configuration section of the documentation, an "Important Note" states, "This plugin overrides the data_file and parallel options of coverage. Unless you also run coverage without pytest-cov it’s pointless to set those options in your .coveragerc."

However, setting "data_file" in the coverage configuration file does have the desired effect per #145.

Versions

Python 2.7.17

This is pytest version 3.8.2, imported from /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/pytest.pyc
setuptools registered plugins:
allure-pytest-2.6.5 at /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/allure_pytest/plugin.py
flaky-3.7.0 at /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/flaky/flaky_pytest_plugin.py
pytest-random-0.2 at /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/random_plugin.py
pytest-timeout-1.4.2 at /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/pytest_timeout.py
pytest-xdist-1.18.0 at /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/xdist/plugin.py
pytest-xdist-1.18.0 at /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/xdist/boxed.py
pytest-xdist-1.18.0 at /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/xdist/looponfail.py
pytest-cov-2.9.0 at /home/sscadmin/.local/share/virtualenvs/dev27/lib/python2.7/site-packages/pytest_cov/plugin.py