Merge pull request #2093 from novas1r1/patch-1

docs(itemReorderButton): update itemReorderButton.js

js/angular/directive/itemReorderButton.js

@@ -23,12 +23,12 @@ var ITEM_TPL_REORDER_BUTTON =
 * @usage
 *
 * ```html
-* <ion-list ng-controller="MyCtrl">
+* <ion-list ng-controller="MyCtrl" show-reorder="true">
 *   <ion-item ng-repeat="item in items">
 *     Item {{item}}
 *     <ion-reorder-button class="ion-navicon"
 *                         on-reorder="moveItem(item, $fromIndex, $toIndex)">
-*     </ion-reorder>
+*     </ion-reorder-button>
 *   </ion-item>
 * </ion-list>
 * ```