Add comprehensive test suite for cuddZddGroup.c - 81% coverage#116

Copilot wants to merge 4 commits into

4.0.0cuddorg/cudd:4.0.0from

copilot/add-test-cases-for-zddgroupcuddorg/cudd:copilot/add-test-cases-for-zddgroupCopy head branch name to clipboard