* HTML5 definition of id attribute
*
* @param string $id Id to escape
- * @param string|array $options String or array of strings (default is array()):
+ * @param string|array $options String or array of strings (default is []):
* 'noninitial': This is a non-initial fragment of an id, not a full id,
* so don't pay attention if the first character isn't valid at the
* beginning of an id.
# rbc
'rb' => $common,
'rp' => $common,
- 'rt' => $common, # array_merge( $common, array( 'rbspan' ) ),
+ 'rt' => $common, # array_merge( $common, [ 'rbspan' ] ),
'rtc' => $common,
# MathML root element, where used for extensions