Merge topic 'command-arg-parser'

4368a524c6 cmCMakePathCommand: Enforce non-empty string arguments via binding type
7ca8d9f0f8 cmArgumentParser: Model non-empty strings with wrapper type

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !7512