* the form:
*
* @code
- * 'UNIQ-xxxxx' => array(
+ * 'UNIQ-xxxxx' => [
* 'element',
* 'tag content',
- * array( 'param' => 'x' ),
- * '<element param="x">tag content</element>' ) )
+ * [ 'param' => 'x' ],
+ * '<element param="x">tag content</element>' ]
* @endcode
*
* @param array $elements List of element names. Comments are always extracted.