Remove trailing whitespace.

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

library/HTMLPurifier/AttrTransform/Input.php

@@ -5,13 +5,13 @@
  * input elements. This is meant to be a post-transform.
  */
 class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform {
-    
+
     protected $pixels;
-    
+
     public function __construct() {
         $this->pixels = new HTMLPurifier_AttrDef_HTML_Pixels();
     }
-    
+
     public function transform($attr, $config, $context) {
         if (!isset($attr['type'])) $t = 'text';
         else $t = strtolower($attr['type']);
@@ -34,6 +34,6 @@ class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform {
         }
         return $attr;
     }
-    
+
 }