Fix help of "show debugging ripng" command.
diff --git a/ripngd/ripng_debug.c b/ripngd/ripng_debug.c
index b9a8fb6..7841fe2 100644
--- a/ripngd/ripng_debug.c
+++ b/ripngd/ripng_debug.c
@@ -33,8 +33,8 @@
        show_debugging_ripng_cmd,
        "show debugging ripng",
        SHOW_STR
-       "RIPng configuration\n"
-       "Debugging information\n")
+       DEBUG_STR
+       "RIPng configuration\n")
 {
   vty_out (vty, "RIPng debugging status:%s", VTY_NEWLINE);