tests: fix doctest stability over Python versions pprint ain't pretty in Python 2.4: Changed in version 2.5: Dictionaries are sorted by key before the display is computed; before 2.5, a dictionary was sorted only if its display required more than one line, although that wasn’t documented. Fixes issue introduced in 404feac78b8a.

tests: stabilize doctest output Avoid dependencies to dict iteration order.

tests: make test-hook.t output more stable