* feed dummy perpendicular point for cross product to prevent zero error in normalization during atropisomer chirality, fixes#8602
* remove debug log
* move test, and check that no bonds
* Fixes#7983
move the call to cleanupAtropisomerStereoGroups() into assignStereochemistry()
* Additional tests from @susanhleung in #8323
* more testing
* changes in response to review
* changes for review