node_memory: Add '\n' to help message

Linefeed is missed in the help of node-memory-tune.
This patch just adds '\n' to get a correct help message.
Signed-off-by: NSatoru Moriya <satoru.moriya@hds.com>

tools/virsh-host.c

@@ -764,7 +764,7 @@ cmdVersion(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
 
 static const vshCmdInfo info_node_memory_tune[] = {
     {"help", N_("Get or set node memory parameters")},
-    {"desc", N_("Get or set node memory parameters"
+    {"desc", N_("Get or set node memory parameters\n"
                 "    To get the memory parameters, use following command: \n\n"
                 "    virsh # node-memory-tune")},
     {NULL, NULL}