Fix printing the address we're listening on

go/favicon/favicon.go

	}
	addr := fmt.Sprintf("localhost:%d", *port)
	fmt.Printf("listening on %s\n", addr)
	err := http.ListenAndServe(addr, nil)
	if err != nil {
		fmt.Println("error: ", err)
		os.Exit(1)
	}
	fmt.Printf("listening on %s\n", addr)
}
func HandleGetFavicon(w http.ResponseWriter, r *http.Request) {