minor code cleanup

lib/runtime/dart_runtime.js

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 var dart;
 (function (dart) {
   var defineProperty = Object.defineProperty;
   var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
   var getOwnPropertyNames = Object.getOwnPropertyNames;
 
   // Adapted from Angular.js
   var FN_ARGS = /^function\s*[^\(]*\(\s*([^\)]*)\)/m;
   var FN_ARG_SPLIT = /,/;
   var FN_ARG = /^\s*(_?)(\S+?)\1\s*$/;
   var STRIP_COMMENTS = /((\/\/.*$)|(\/\*[\s\S]*?\*\/))/mg;
 
   function formalParameterList(fn) {
     var fnText,argDecl;
     var args=[];
     fnText = fn.toString().replace(STRIP_COMMENTS, '');
     argDecl = fnText.match(FN_ARGS);
 
     var r = argDecl[1].split(FN_ARG_SPLIT);
-    for(var a in r){
+    for(var a in r) {
       var arg = r[a];
       arg.replace(FN_ARG, function(all, underscore, name){
         args.push(name);
       });
     }
     return args;
   }
 
   function dload(obj, field) {
     if (!(field in obj)) {
@@ skipping 313 matching lines @@
     var init = this[name];
     var result = void 0;
     if (init) result = init.apply(this, arguments);
     return result === void 0 ? this : result;
   };
   // The initializer for dart.Object
   dart.Object.prototype.Object = function() {};
   dart.Object.prototype.constructor = dart.Object;
 
 })(dart || (dart = {}));