* Fix diff property, ugh.

* Add missing docstring support

* Test the values, not the truthy property of these arrays.

* Get op (woops).

* Add jump property to TracePair.

* Change jump --> diff

* Add simple smoke test for trace pair

* placate flake8

* Undo spurious chage to primitives.py

* Tweak TracePair docstrings

Co-authored-by: Andreas Kloeckner <inform@tiker.net>