patch 9.0.1647: insufficient testing for syntax plugins

Problem:    Insufficient testing for syntax plugins.
Solution:   Add shell file examples. (Charles Campbell)  Create a messages
            file for easier debugging and reporting the test results.

runtime/syntax/testdir/input/sh_07.sh

@@ -0,0 +1,93 @@
+#!/bin/sh
+# Test file to test 'for do done' loops.
+# You can start this script like: $0 {-ne -gt -le ...} (all numeric operators 
+# are allowed!
+
+# All this works and should be OK
+
+################################################################################
+#
+# For loop without 'in list'. Uses $1 $2 ... This is a special case!
+# This 'for Var, do, done' is a very handy solution AND no real replacement 
+# available!
+#
+Function1 () {
+
+echo "Function1: for loop inside a function:\t\c"
+[ "$*" ] || echo "none\c"
+
+for Var
+do
+    [ 1 $Var 2 ] && echo "OK \c" || echo "no \c"
+done
+echo
+
+} # End of Function1
+
+################################################################################
+#
+# For loop with 'in list' $*
+#
+Function2 () {
+
+echo "Function2: for loop inside a function:\t\c"
+for Var in $*
+do
+    [ 1 $Var 2 ] && echo "OK \c" || echo "no \c"
+done ; echo
+
+} # End of Function2
+
+################################################################################
+#
+# For loop with 'in list' $@. Works the same way as $*
+#
+Function3 () {
+
+echo "Function3: for loop inside a function:\t\c"
+for Var in $@
+do
+    [ 1 $Var 2 ] && echo "OK \c" || echo "no \c"
+done ; echo
+
+} # End of Function3
+
+################################################################################
+#
+# For loop with 'in list' "$@". Special case. Works like "$1" "$2" ...
+#
+Function4 () {
+
+echo "Function4: for loop inside a function:\t\c"
+for Var in "$@"
+do
+    [ 1 $Var 2 ] && echo "OK \c" || echo "no \c"
+done ; echo
+
+} # End of Function4
+
+
+################################################################################
+# main ### main ### main ### main ### main ### main ### main ### main ### main #
+################################################################################
+#
+# Here is the heart of this script:
+#
+echo "Processing the following command line arguements: ${*:-none}"
+echo "Script:    for loop outside a function:\t\c"
+for Var
+do
+    [ 1 $Var 2 ] && echo "OK \c" || echo "no \c"
+done ; echo
+
+# Same as function calls
+Function1 -eq -ne -gt -ge -le -lt
+Function2 -eq -ne -gt -ge -le -lt
+Function3 -eq -ne -gt -ge -le -lt
+Function4 -eq -ne -gt -ge -le -lt '-ge 1 -a 2 -ge'
+
+# Now the same call like Function4 but with Function1
+Function1 -eq -ne -gt -ge -le -lt '-ge 1 -a 2 -ge'
+Function1
+
+exit $?