more extensive __file__ tests, #408
more extensive __file__ tests, #408

flurischt/jedi,tjwei/jedi,flurischt/jedi,dwillmer/jedi,tjwei/jedi,WoLpH/jedi,jonashaag/jedi,dwillmer/jedi,mfussenegger/jedi,jonashaag/jedi,WoLpH/jedi,mfussenegger/jedi