Merge topic 'ply_noname_support'

1294302b Delimiting newlines should be kept when the solid does not have name with it

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Reviewed-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Acked-by: Andras Lasso <lasso@queensu.ca>
Merge-request: !10215