TUT: avoid backticks in scripts

- consistent versions in headers

tutorials/IO/fileHandler/Allclean

@@ -0,0 +1,9 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+# Source tutorial clean functions
+. $WM_PROJECT_DIR/bin/tools/CleanFunctions
+
+cleanCase
+
+#------------------------------------------------------------------------------

tutorials/IO/fileHandler/Allrun

@@ -6,9 +6,11 @@ cd ${0%/*} || exit 1    # Run from this directory
 
 runApplication blockMesh
 
+application=$(getApplication)
+
 #- Test writing collated format
 runApplication decomposePar -fileHandler collated
-runParallel `getApplication` -fileHandler collated
+runParallel $application -fileHandler collated
 runApplication reconstructPar -latestTime -fileHandler collated
 
 #- Delete collated files
@@ -16,10 +18,10 @@ rm -rf processors
 
 #- Test writing uncollated format
 runApplication -s uncollated decomposePar -fileHandler uncollated
-runParallel -s uncollated `getApplication` -fileHandler uncollated
+runParallel -s uncollated $application -fileHandler uncollated
 
 #- Restart from uncollated
-runParallel -s collated `getApplication` -fileHandler collated
+runParallel -s collated $application -fileHandler collated
 runApplication -s collated reconstructPar -latestTime -fileHandler collated
 
 #- Convert the parallel format to uncollated