Added sync comment

src/utils/exerciseServer.ts

@@ -75,6 +75,7 @@ async function exerciseServerWorker(testDir: string, tsserverPath: string, repla
         serverArgs,
     }) + "\n");
 
+    // Keep in sync with typescrit-server-replay repo: https://github.com/microsoft/typescript-server-replay/blob/0cf42b98c3592805901c9de025b59315b6fd2a80/replay.js#L234
     const server = sh.launchServer(
         tsserverPath,
         serverArgs,