py.path.local('/').join('tox.ini') produces '//tox.ini', causing pytest to hang on cygwin.

[account-login]

The double slash path is causing problems, see pytest-dev/pytest#2135 for details.

This issue can be fixed by changing strpath = strpath + sep + arg to strpath = strpath.rstrip(sep) + sep + arg in py.path.local.join()

[RonnyPfannschmidt]

fixed by #127