sed: fix a command with multible trailing backslashes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/testsuite/testing.sh b/testsuite/testing.sh
old mode 100755
new mode 100644
index 65a0f65..913d7f8
--- a/testsuite/testing.sh
+++ b/testsuite/testing.sh
@@ -73,7 +73,7 @@
 
   if [ $# -ne 5 ]
   then
-    echo "Test $NAME has wrong number of arguments (must be 5) ($# $*)" >&2
+    echo "Test $NAME has wrong number of arguments: $# (must be 5)" >&2
     exit 1
   fi