Correct CVC3's equality operator.

CVC3 uses the '=' operator for equality, not '=='.  Fix this to ensure it
is correct.

git-svn-id: https://groke.mcmaster.ca/svn/grad/colin/branches/TableTool_javization@10539 57e6efec-57d4-0310-aeb1-a6c144bb1a8b