chore(docs): use $document[0]

Author: sathify

docs/app/src/search.js

@@ -202,13 +202,13 @@ angular.module('search', [])
   };
 })
 
-.directive('docsSearchInput', ['$document',function($document) {
+.directive('docsSearchInput', ['$document', function($document) {
   return function(scope, element, attrs) {
     var ESCAPE_KEY_KEYCODE = 27,
         FORWARD_SLASH_KEYCODE = 191;
     angular.element($document[0].body).on('keydown', function(event) {
       var input = element[0];
-      if (event.keyCode === FORWARD_SLASH_KEYCODE && window.document.activeElement !== input) {
+      if (event.keyCode === FORWARD_SLASH_KEYCODE && $document[0].activeElement !== input) {
         event.stopPropagation();
         event.preventDefault();
         input.focus();