Review markups

 - Clean up `arguments` -> `Array`

Author: alecgibson

lib/util.js

@@ -101,11 +101,8 @@ exports.clone = function(obj) {
 exports.deduplicateRequests = function(fn) {
   var callbacksByArgs = {};
   return function() {
-    var callback = arguments[arguments.length - 1];
-    var args = [];
-    for (var i = 0; i < arguments.length - 1; i++) {
-      args.push(arguments[i]);
-    }
+    var args = Array.prototype.slice.call(arguments);
+    var callback = args.pop();
     var argString = JSON.stringify(args);
 
     var callbacks = exports.digOrCreate(callbacksByArgs, argString, function() {