node: Tweak CLI arg message
@@ -131,7 +131,7 @@ fn async_main() -> impl Future<Item = (), Error = ()> + Send + 'static {
.default_value("default")
.long("node-id")
.value_name("NODE_ID")
- .help("an identifier for this Graph node"),
+ .help("a unique identifier for this node"),
).arg(
Arg::with_name("debug")
.long("debug")
