move examples to doc directory

--HG--
branch : trunk

example/assertion/test_failures.py

@@ -1,14 +0,0 @@
-
-import py
-failure_demo = py.magic.autopath().dirpath('failure_demo.py')
-
-pytest_plugins = "pytest_pytester"
-
-def test_failure_demo_fails_properly(testdir): 
-    reprec = testdir.inline_run(failure_demo)
-    passed, skipped, failed = reprec.countoutcomes() 
-    assert passed == 0 
-    assert failed == 20, failed
-    colreports = reprec.getreports("pytest_collectreport")
-    failed = len([x.failed for x in colreports])
-    assert failed == 4