Merge topic 'ignore-baseline-images'

45a5403b gitignore: ignore baseline image files

Acked-by: Kitware Robot <kwrobot@kitware.com>
Rejected-by: buildbot <buildbot@kitware.com>
Reviewed-by: Jaswant Panchumarti (Kitware) <jaswant.panchumarti@kitware.com>
Merge-request: !11911

.gitignore

@@ -2,6 +2,9 @@
 .ExternalData_*
 .ExternalData/config
 
+# Do not commit baseline image files.
+**/Testing/Data/Baseline/*.png
+
 # Exclude compiled Python objects.
 *.pyc
 *.pyo