[windows] pyreadline + py.test on a single file sets terminal color to black

[ratiotile]

After running py.test test.py, the terminal color becomes black on black, rendering everything afterward unreadable.
This does not happen when running only py.test
This bug only occurs when pyreadline is installed.

pytest==2.8.5
pyreadline==2.1
Windows 8.1, Python 3.4

[nicoddemus]

Thanks!

[RonnyPfannschmidt]

this was fixed by #1281