docs(guide/Services): add whitespace in code example

Closes angular#14156

Author: Narretz

docs/content/guide/services.ngdoc

@@ -43,7 +43,7 @@ subsystem takes care of the rest.
   <file name="script.js">
     angular.
      module('myServiceModule', []).
-      controller('MyController', ['$scope','notify', function ($scope, notify) {
+      controller('MyController', ['$scope', 'notify', function ($scope, notify) {
         $scope.callNotify = function(msg) {
           notify(msg);
         };