Remove trailing whitespace.

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

library/HTMLPurifier/AttrDef/HTML/Length.php

@@ -2,39 +2,39 @@
 
 /**
  * Validates the HTML type length (not to be confused with CSS's length).
- * 
+ *
  * This accepts integer pixels or percentages as lengths for certain
  * HTML attributes.
  */
 
 class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
 {
-    
+
     public function validate($string, $config, $context) {
-        
+
         $string = trim($string);
         if ($string === '') return false;
-        
+
         $parent_result = parent::validate($string, $config, $context);
         if ($parent_result !== false) return $parent_result;
-        
+
         $length = strlen($string);
         $last_char = $string[$length - 1];
-        
+
         if ($last_char !== '%') return false;
-        
+
         $points = substr($string, 0, $length - 1);
-        
+
         if (!is_numeric($points)) return false;
-        
+
         $points = (int) $points;
-        
+
         if ($points < 0) return '0%';
         if ($points > 100) return '100%';
-        
+
         return ((string) $points) . '%';
-        
+
     }
-    
+
 }