Merge topic 'isspace'

d9d9326e14 Source: Avoid out-of-range inputs to std::isspace()
14abdc8e2b cmXMLParser: Remove unused IsSpace method

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !9162