Merge topic 'remove-trailing-whitespace'

a3e3862b Rendering/ZSpace: use `option` instead of `set(CACHE BOOL)`
91899628 vtkZSpaceSDKManager: use debug logging for ZSpace SDK selection
284c0b6a Rendering/ZSpace: use `VTK_` to prefix options made by VTK
8fbc260f Rendering/ZSpace: fix some CMake whitespace style
8ea7a829 Rendering/ZSpace: fix some CMake style
8a805ab3 Rendering/ZSpace: localize the SDK selection
7245f658 whitespace: remove trailing whitespace

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Tested-by: Thomas Galland <thomas.galland@kitware.com>
Merge-request: !10328