iplink: fix help text syntax

Get rid of extraneous closing brackets and while here, merge the double
netns parameter.
Signed-off-by: Phil Sutter <phil@nwl.cc>

ip/iplink.c

@@ -70,17 +70,16 @@ void iplink_usage(void)
 	fprintf(stderr, "	                  [ address LLADDR ]\n");
 	fprintf(stderr, "	                  [ broadcast LLADDR ]\n");
 	fprintf(stderr, "	                  [ mtu MTU ]\n");
-	fprintf(stderr, "	                  [ netns PID ]\n");
-	fprintf(stderr, "	                  [ netns NAME ]\n");
+	fprintf(stderr, "	                  [ netns { PID | NAME } ]\n");
 	fprintf(stderr, "	                  [ link-netnsid ID ]\n");
 	fprintf(stderr, "			  [ alias NAME ]\n");
 	fprintf(stderr, "	                  [ vf NUM [ mac LLADDR ]\n");
 	fprintf(stderr, "				   [ vlan VLANID [ qos VLAN-QOS ] ]\n");
 
-	fprintf(stderr, "				   [ rate TXRATE ] ]\n");
+	fprintf(stderr, "				   [ rate TXRATE ]\n");
 
-	fprintf(stderr, "				   [ spoofchk { on | off} ] ]\n");
-	fprintf(stderr, "				   [ query_rss { on | off} ] ]\n");
+	fprintf(stderr, "				   [ spoofchk { on | off} ]\n");
+	fprintf(stderr, "				   [ query_rss { on | off} ]\n");
 	fprintf(stderr, "				   [ state { auto | enable | disable} ] ]\n");
 	fprintf(stderr, "				   [ trust { on | off} ] ]\n");
 	fprintf(stderr, "			  [ master DEVICE ]\n");