BUG: Workaround docutils/sphinx file_insertion_enable settings bug.
BUG: Workaround docutils/sphinx file_insertion_enable settings bug.

Change-Id: Ia78370c494229bf6a942d2c65b088a48b9b983d8

InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples