More novice friendly config for gii/debug

config/web.php

@@ -45,10 +45,14 @@ $config = [
 if (YII_ENV_DEV) {
     // configuration adjustments for 'dev' environment
     $config['bootstrap'][] = 'debug';
-    $config['modules']['debug'] = 'yii\debug\Module';
+    $config['modules']['debug'] = [
+        'class' => 'yii\debug\Module',
+    ];
 
     $config['bootstrap'][] = 'gii';
-    $config['modules']['gii'] = 'yii\gii\Module';
+    $config['modules']['gii'] = [
+        'class' => 'yii\gii\Module',
+    ];
 }
 
 return $config;