Merge topic 'doc-get-properties-inherited'

8086badba4 Help: Fix wrong return values for unset inherited properties
1ca5ec67b0 Help: Add missing DIRECTORY keyword to set_tests_properties() signature
34379f005b Help: Use <variable> consistently in property getter commands
29ccc9a4cd Help: Use <xxx> for non-keyword arguments in property command signatures

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !9131