fix arguments keyword used in our helper method

lib/runtime/dart/core.js

 var core;
 (function(exports) {
   'use strict';
   class Object {
     constructor() {
       var name = this.constructor.name;
       var init = this[name];
       var result = void 0;
       if (init)
-        result = init.apply(this, arguments$);
+        result = init.apply(this, arguments);
       return result === void 0 ? this : result;
     }
     ['=='](other) {
       return identical(this, other);
     }
     get hashCode() {
       return _js_helper.Primitives.objectHashCode(this);
     }
     toString() {
       return _js_helper.Primitives.objectToString(this);
@@ skipping 3049 matching lines @@
   exports.StackTrace = StackTrace;
   exports.Stopwatch = Stopwatch;
   exports.String = String;
   exports.RuneIterator = RuneIterator;
   exports.StringBuffer = StringBuffer;
   exports.StringSink = StringSink;
   exports.Symbol = Symbol;
   exports.Type = Type;
   exports.Uri = Uri;
 })(core || (core = {}));