corrected cookie-jar comment

lib/cookie.c

@@ -624,7 +624,7 @@ int Curl_cookie_output(struct CookieInfo *c, char *dumphere)
   if(c) {
     fputs("# Netscape HTTP Cookie File\n"
           "# http://www.netscape.com/newsref/std/cookie_spec.html\n"
-          "# This is generated by libcurl! Edit on your own risk.\n\n",
+          "# This file was generated by libcurl! Edit at your own risk.\n\n",
           out);
     co = c->cookies;