Remove ASCII art from mDNS error log

Author: jmagman

shell/platform/darwin/ios/framework/Source/FlutterObservatoryPublisher.mm

@@ -115,7 +115,6 @@ - (void)publishServiceProtocolPort:(NSString*)uri {
     FML_LOG(ERROR) << "Failed to register observatory port with mDNS with error " << err << ".";
     if (@available(iOS 14.0, *)) {
       FML_LOG(ERROR)
-          << "▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒\n"
           << "On iOS 14+, local network broadcast in apps need to be declared in "
           << "the app's Info.plist. Debug and profile Flutter apps and modules host "
           << "VM services on the local network to support debugging features such "
@@ -125,8 +124,7 @@ - (void)publishServiceProtocolPort:(NSString*)uri {
           << "Profile configurations.\n\n"
           << "For more information, see "
           // Update link to a specific header as needed.
-          << "https://flutter.dev/docs/development/add-to-app/ios/project-setup"
-          << "\n▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒";
+          << "https://flutter.dev/docs/development/add-to-app/ios/project-setup";
     }
   } else {
     DNSServiceSetDispatchQueue(_dnsServiceRef, dispatch_get_main_queue());