drivers=_overlap|_no_overlap|invalid_

--  Consolidate results for tests involving valid and invalid ranges for both
--  A and B.  Exempted precondition evaluated both True and False, independant
-- of both conditions demonstrated.

--# ranges.adb
--  /checkValid/    l+ ## 0
--  /assignValid/   l+ ## 0
--  /assignInvalid/ l+ ## 0
--  /preValid/      l# ## x0
--  /checkOverlap/  l+ ## 0
