fix: invalid ipv6 hostname on deno serve

ext/http/00_serve.ts

@@ -685,9 +685,7 @@ function serve(arg1, arg2) {
     if (options.onListen) {
       options.onListen(addr);
     } else {
-      const host = StringPrototypeIncludes(addr.hostname, ":")
-        ? `[${addr.hostname}]`
-        : addr.hostname;
+      const host = formatHostName(addr.hostname);
       // deno-lint-ignore no-console
       console.log(`Listening on ${scheme}${host}:${addr.port}/`);
     }
@@ -696,6 +694,15 @@ function serve(arg1, arg2) {
   return serveHttpOnListener(listener, signal, handler, onError, onListen);
 }
 
+/**
+ * @param {string} received
+ * @returns {string}
+ */
+function formatHostName(received) {
+  // Add brackets around ipv6 host
+  return StringPrototypeIncludes(received, ":") ? `[${received}]` : received;
+}
+
 /**
  * Serve HTTP/1.1 and/or HTTP/2 on an arbitrary listener.
  */
@@ -862,9 +869,11 @@ function registerDeclarativeServer(exports) {
             const nThreads = serveWorkerCount > 1
               ? ` with ${serveWorkerCount} threads`
               : "";
+
+            const host = formatHostName(hostname);
             // deno-lint-ignore no-console
             console.debug(
-              `%cdeno serve%c: Listening on %chttp://${hostname}:${port}/%c${nThreads}`,
+              `%cdeno serve%c: Listening on %chttp://${host}:${port}/%c${nThreads}`,
               "color: green",
               "color: inherit",
               "color: yellow",