Issue #1548038 by Rob Loach: Fix typo in CacheArray.php documentation

core/lib/Drupal/Core/Utility/CacheArray.php

@@ -38,9 +38,8 @@
  * otherwise, will fail silently. So $var = &$object['foo'] will not throw an
  * error, and $var will be populated with the contents of $object['foo'], but
  * that data will be passed by value, not reference. For more information on
- * the PHP limitation, see the note in the official PHP documentation atá
- * http://php.net/manual/arrayaccess.offsetget.php on
- * ArrayAccess::offsetGet().
+ * the PHP limitation, see the note in the official PHP documentation at
+ * http://php.net/manual/arrayaccess.offsetget.php on ArrayAccess::offsetGet().
  *
  * By default, the class accounts for caches where calling functions might
  * request keys in the array that won't exist even after a cache rebuild. This