Get rid of runtime.block_on() in sc-network-test

client/network/test/src/lib.rs

@@ -1032,6 +1032,7 @@ where
 	/// Calls `poll_until_sync` repeatedly.
 	/// (If we've not synced within 10 mins then panic rather than hang.)
 	async fn wait_until_sync(&mut self) {
+		// TODO: rename into run_until_sync() (and below).
 		timeout(
 			Duration::from_secs(10 * 60),
 			futures::future::poll_fn::<(), _>(|cx| self.poll_until_sync(cx)),