Submitted upstream as https://sourceforge.net/p/openil/patches/53/

Fix to allow running with regular shell. Actually, even bash was erroring
out for some reason...
--- test/format_test/format_checks.sh.in	2009-03-08 03:10:07.000000000 -0400
+++ test/format_test/format_checks.sh.in	2016-01-10 23:37:45.922896000 -0500
@@ -27,8 +27,17 @@
 do
 	#echo expr match "' $CAN_SAVE '" '.*\s'$EXTENSION'\s.*'
-	if [ $(expr match "' $CAN_SAVE '" '.*\s'$EXTENSION'\s.*') -eq 0 -o $(expr match "' $PROBLEMATIC '" '.*\s'$EXTENSION'\s.*') -ne 0 ] 
-	then # This extension is not considered as supported...
-		continue;
-	fi
+	case $CAN_SAVE in
+	*$EXTENSION*)
+		;;
+	*)
+		# This extension is not considered as supported...
+		continue
+		;;
+	esac
+	case $PROBLEMATIC in
+	*$EXTENSION*)
+		continue
+		;;
+	esac	
 	test -n	"$VERBOSE" && echo $WINE ./testil@EXEEXT@ -e $EXTENSION
 	# EXEEXT comes in when one compiles on platforms that append extensions to executables (testil.exe)