chore(orderBy): Update documentation based on code review.

Author: nhodges

docs/content/error/orderBy/notarray.ngdoc

@@ -3,7 +3,7 @@
 @fullName Not an array
 @description
 
-This error occurs when {@link ng.orderBy filter} is not used with an array:
+This error occurs when {@link ng.orderBy orderBy} is not used with an array:
 ```html
 <input ng-model="search">
 <div ng-repeat="(key, value) in myObj | orderBy:search">
@@ -16,29 +16,26 @@ The array can be initialized asynchronously and therefore null or undefined won'
 
 To orderBy an object by the value of its properties you can create your own array based on that object:
 ```js
-angular.module('aModule',[])
+angular.module('aModule', [])
   .controller('aController', function($scope) {
-    var obj = {
-      one:   {
-              name: 'something 1'
-              },
-      two:   {
-              name: 'something 2'
-             },
-      three: {
-             name: 'something 3'
-             },
+    var myObj = {
+      one: {id: 1, name: 'Some thing'},
+      two: {id: 2, name: 'Another thing'},
+      three: {id: 3, name: 'A third thing'}
     };
 
-    //if using underscore
-    $scope.objToArray = = _.values(obj);
-
+    $scope.arrFromMyObj = Object.keys(myObj).map(function(key) {
+      return myObj[key];
+    });
   });
 ```
 That can be used as:
 ```html
-<input ng-model="search">
-<div ng-repeat="some in objToArray | orderBy:'name'">
+<label>
+  Order by:
+  <select ng-model="orderProp" ng-options="prop for prop in ['id', 'name']"></select>
+</label>
+<div ng-repeat="(key, value) in myObj | orderBy:orderProp">
   {{ key }} : {{ value }}
 </div>
 ```