def _repr_pprint(obj, p, cycle):
    p.text(repr(obj))
best_prefix_base: large negative values retain their prefix unit
dataset/ETHPy150Open ipython/ipython-py3k/IPython/lib/pretty.py/_repr_pprint--crossover with--dataset/ETHPy150Open tbielawa/bitmath/tests/test_best_prefix_BASE.py/TestBestPrefixBASE.test_best_prefix_negative_huge_numbers