Fix typo in weaver CLI help

prog/weaver/main.go

@@ -105,7 +105,7 @@ func main() {
 	mflag.StringVar(&datapathName, []string{"-datapath"}, "", "ODP datapath name")
 	mflag.StringVar(&dbPrefix, []string{"-db-prefix"}, "weave", "pathname/prefix of filename to store data")
 
-	mflag.StringVar(&trustedSubnetStr, []string{"-trusted-subnets"}, "", "Command separated list of trusted subnets in CIDR notation")
+	mflag.StringVar(&trustedSubnetStr, []string{"-trusted-subnets"}, "", "Comma-separated list of trusted subnets in CIDR notation")
 
 	// crude way of detecting that we probably have been started in a
 	// container, with `weave launch` --> suppress misleading paths in