Remove trailing whitespace.

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

library/HTMLPurifier/AttrTransform/Textarea.php

@@ -5,12 +5,12 @@
  */
 class HTMLPurifier_AttrTransform_Textarea extends HTMLPurifier_AttrTransform
 {
-    
+
     public function transform($attr, $config, $context) {
         // Calculated from Firefox
         if (!isset($attr['cols'])) $attr['cols'] = '22';
         if (!isset($attr['rows'])) $attr['rows'] = '3';
         return $attr;
     }
-    
+
 }