skipif requires expression as a string, example in documentation is wrong.
The documentation on about skipIf contains an example with an error. The expression of
skipIf must be a string, if not you'll get this error:
Error evaluating 'skipif' expression False Failed: expression is not a string
The expression must be wrapped into quotes. Also it would be better to mention the string requirement explicitly. Because
Explicit is better than implicit.
Tested in platform linux2 -- Python 2.7.3 -- pytest-2.3.5