STYLE: Fix alignment in itkMask{Image,Negated}ImageFilter.h

Change-Id: I5ce306d4f89deb47abdb51bafb67ba5099cefaa1
ENH: Doxygen configuration update to 1.8.3.1.

Change-Id: Ie9480ead7c880cafdbf40158d47e86a56caf4e1b
Merge topic 'StyleCheck'

8d8dff1 STYLE: Fix alignment in itkMask{Image,Negated}ImageFilter.h
Merge topic 'DoxygenUpdate'

d47dbcc ENH: Doxygen configuration update to 1.8.3.1.