german translatoin update

framework/messages/de/yii.php

@@ -2,7 +2,7 @@
 /**
  * Message translations.
  *
- * This file is automatically generated by 'yii message' command.
+ * This file is automatically generated by 'yii message/extract' command.
  * It contains the localizable messages extracted from source code.
  * You may modify this file by translating the extracted messages.
  *
@@ -17,6 +17,7 @@
  * NOTE: this file must be saved in UTF-8 encoding.
  */
 return [
+    'Unknown alias: -{name}' => 'Unbekannter Alias: -{name}',
     '(not set)' => '(nicht gesetzt)',
     'An internal server error occurred.' => 'Es ist ein interner Serverfehler aufgetreten.',
     'Are you sure you want to delete this item?' => 'Wollen Sie diesen Eintrag wirklich löschen?',