Remove trailing whitespace.

Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>

library/HTMLPurifier/AttrDef/HTML/Bool.php

@@ -5,23 +5,23 @@
  */
 class HTMLPurifier_AttrDef_HTML_Bool extends HTMLPurifier_AttrDef
 {
-    
+
     protected $name;
     public $minimized = true;
-    
+
     public function __construct($name = false) {$this->name = $name;}
-    
+
     public function validate($string, $config, $context) {
         if (empty($string)) return false;
         return $this->name;
     }
-    
+
     /**
      * @param $string Name of attribute
      */
     public function make($string) {
         return new HTMLPurifier_AttrDef_HTML_Bool($string);
     }
-    
+
 }