[py-dev] improved reporting ...

[holger krekel]

hi py.test.onistas, 

i have cleaned up and improved the text-reporting for
failing tests (i think :-).  You can see the results with e.g. 

    py.test py/documentation/example/pytest/failure_demo.py 

which gives you a list of 40 reported failing tests.  

have fun (and report back glitches), 

    holger