TUT: simple test for redistributePar with distributed roots

TUT: prefer 'subtract' instead of old 'delete'

TUT: enable multiFieldValue function object, update topoSet action

tutorials/IO/fileHandler/Allclean

@@ -5,7 +5,7 @@ cd "${0%/*}" || exit                                # Run from this directory
 
 cleanCase0
 
-rm -rf machineA
-rm -rf machineB
+rm -rf machine*
+rm -rf test-*
 
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