Remove trailing whitespace.

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

library/HTMLPurifier/Definition.php

@@ -6,24 +6,24 @@
  */
 abstract class HTMLPurifier_Definition
 {
-    
+
     /**
      * Has setup() been called yet?
      */
     public $setup = false;
-    
+
     /**
      * What type of definition is it?
      */
     public $type;
-    
+
     /**
      * Sets up the definition object into the final form, something
      * not done by the constructor
      * @param $config HTMLPurifier_Config instance
      */
     abstract protected function doSetup($config);
-    
+
     /**
      * Setup function that aborts if already setup
      * @param $config HTMLPurifier_Config instance
@@ -33,6 +33,6 @@ abstract class HTMLPurifier_Definition
         $this->setup = true;
         $this->doSetup($config);
     }
-    
+
 }