Looks like this fixes all HACKING problems that were around.
Thanks to Dina Belova and Alexander Kovalev for this work.
Change-Id: I8157f0d4890184c1216aab63ef7180ee8b7a184d
Tests so far:
N101 TODO format
N201 Except format
N301 One import per line
N302 import only modules
N303 Invalid Import
N304 Relative Import
Change-Id: I33c021b842e7199b1f5f1f699ea17f7fa5f8ca49