Merge topic 'doc-CMP0118'

1dabbbb5e0 CMP0118: Revise documentation to describe actual behavior
d2f5b79795 CMP0118: Fix some tests and add more tests

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Merge-request: !9358