Merge topic 'fix-vtk-logger-preamble-logic'

eb57ceac Fix logic for skipping preamble header with loguru

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Reviewed-by: Cory Quammen <cory.quammen@kitware.com>
Acked-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Merge-request: !11808