PSR-2 reformatting PHPDoc corrections

With minor corrections.

Signed-off-by: Marcus Bointon <marcus@synchromedia.co.uk>
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>

library/HTMLPurifier/ChildDef/Empty.php

@@ -9,10 +9,28 @@
  */
 class HTMLPurifier_ChildDef_Empty extends HTMLPurifier_ChildDef
 {
+    /**
+     * @type bool
+     */
     public $allow_empty = true;
+
+    /**
+     * @type string
+     */
     public $type = 'empty';
-    public function __construct() {}
-    public function validateChildren($tokens_of_children, $config, $context) {
+
+    public function __construct()
+    {
+    }
+
+    /**
+     * @param array $tokens_of_children
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return array
+     */
+    public function validateChildren($tokens_of_children, $config, $context)
+    {
         return array();
     }
 }