Merge branch 'SoftwareGuideSpatialObjectsV5' of https://github.com:/aylward/ITKSoftwareGuide into SoftwareGuideSpatialObjectsV5

Author: aylward

SoftwareGuide/Latex/Architecture/SpatialObjects.tex

@@ -149,7 +149,7 @@ \subsection{TubeSpatialObject}
 
 \doxygen{TubeSpatialObject} is a class for the representation
 of tubular structures using SpatialObjects.  In particular, it is intended
-to be used to represent vascular networks extracted from 2D and 3D images. 
+to be used to represent vascular networks extracted from 2D and 3D images.
 It can also be used to represent airways, nerves, bile ducts, and more.
 
  The class \doxygen{DTITubeSpatialObject} is derived from this class

SuperBuild/External_ITK.cmake

@@ -104,7 +104,8 @@ if(NOT ( DEFINED "${extProjName}_DIR" OR ( DEFINED "USE_SYSTEM_${extProjName}" A
   ### --- End Project specific additions
   set(${proj}_REPOSITORY ${git_protocol}://github.com/InsightSoftwareConsortium/ITK.git)
   if("${${proj}_GIT_TAG}" STREQUAL "")
-    set(${proj}_GIT_TAG "1e454c81e1811e58c579abadd56536de3bef0e42")
+    # ITK release branch 2019-05-23
+    set(${proj}_GIT_TAG "4c31c04085d9e423cd4af68978416a9f975f5113")
   endif()
 
   ExternalProject_Add(${proj}