Add doctests to H201, H202 and fix False Positive in H202

Fix H202 to pass the following doctest
Okay: self.assertRaises(ExceptionStrangeNotation)

Change-Id: I75c5cab81398f4cde5840b3b2082bd1f6ccb2661
Update H3xx doctests

Add TODO for H301, Add new H306 test

Change-Id: I08e5a0f3efd7db6557ca92fe86eebdf0af87ff67
Add H402 doctest and other doc cleanups

Add note to move H601
FIx docstrings for H902 and H902

Change-Id: I157ee4d08dd665611ac0d5417e7e54553be8be2c
Merge "Add doctests to H201, H202 and fix False Positive in H202"
Merge "Update H3xx doctests"
Merge "Add H402 doctest and other doc cleanups"