title: AngularJS Error: [$injector:itkn] Incorrect injection token! Expected service name as string, got undefined
body: <p>Trying to run an Angular app containing this controller:</p>
  
  <pre><code>routerApp.controller('chartSettingsCtrl', ['$scope', '$timeout', 
   , function($scope, $timeout) { /* body omitted */ }
  </code></pre>
  
  <p>gives me the error:</p>
  
  <pre><code>Error: [$injector:itkn] Incorrect injection token! Expected service name as string, got undefined
  </code></pre>
  
  <p>What am I doing wrong?</p>