drivers=_overlap|_no_overlap

--  Consolidate results for tests involving valid ranges only.
--  Exempted precondition evaluated True only.

--# ranges.adb
--  /checkValid/    l! ## dT-
--  /assignValid/   l+ ## 0
--  /assignInvalid/ l- ## s-
--  /preValid/      l* ## x+
--  /preValid_cond/ l= ## XoF-
--  /checkOverlap/  l+ ## 0
