title: Angularjs - ng-click not firing
body: <p>$scope.testing is being added as the button Id correctly but clicking the button doesn't fire the alert.</p>
  
  <p>See example - <a href="http://plnkr.co/edit/RtidzgiUI7ZAMOTu3XHy?p=preview">http://plnkr.co/edit/RtidzgiUI7ZAMOTu3XHy?p=preview</a></p>
  
  <p>CONTROLLER</p>
  
  <pre><code>var app = angular.module('StockCategory', []);
  
  app.controller('stockCategoryController', function($scope) {
    $scope.testing = 'World';
  
    $scope.saveCategory = function() {
  
      alert('hello');
    }
  });
  </code></pre>
  
  <p>HTML</p>
  
  <pre><code>&lt;div class="stock-categories" ng-app="StockCategory" ng-controller="stockCategoryController"&gt;
      &lt;button class="btn save-cat" id="{{testing}}" ng-­click="saveCategory();"&gt;Save&lt;/button&gt;
    &lt;/div&gt;
  </code></pre>