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/AttrDef/URI/Email.php

@@ -5,8 +5,11 @@ abstract class HTMLPurifier_AttrDef_URI_Email extends HTMLPurifier_AttrDef
 
     /**
      * Unpacks a mailbox into its display-name and address
+     * @param string $string
+     * @return mixed
      */
-    function unpack($string) {
+    public function unpack($string)
+    {
         // needs to be implemented
     }