ofproto-dpif: Improve help output for ofproto/trace.

Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
index 2551370..c62fbd9 100644 (file)
--- a/ofproto/ofproto-dpif.c
+++ b/ofproto/ofproto-dpif.c
@@ -5898,7 +5898,7 @@ ofproto_dpif_unixctl_init(void)
 
     unixctl_command_register(
         "ofproto/trace",
-        "[dp_name]|bridge odp_flow|br_flow [-generate|packet]",
+        "{[dp_name] odp_flow | bridge br_flow} [-generate|packet]",
         1, 3, ofproto_unixctl_trace, NULL);
     unixctl_command_register("fdb/flush", "[bridge]", 0, 1,
                              ofproto_unixctl_fdb_flush, NULL);