Remove trailing whitespace.

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

library/HTMLPurifier/ErrorStruct.php

@@ -8,7 +8,7 @@
  */
 class HTMLPurifier_ErrorStruct
 {
-    
+
     /**
      * Possible values for $children first-key. Note that top-level structures
      * are automatically token-level.
@@ -16,12 +16,12 @@ class HTMLPurifier_ErrorStruct
     const TOKEN     = 0;
     const ATTR      = 1;
     const CSSPROP   = 2;
-    
+
     /**
      * Type of this struct.
      */
     public $type;
-    
+
     /**
      * Value of the struct we are recording errors for. There are various
      * values for this:
@@ -30,19 +30,19 @@ class HTMLPurifier_ErrorStruct
      *  - CSSPROP: array('prop-name', 'value')
      */
     public $value;
-    
+
     /**
      * Errors registered for this structure.
      */
     public $errors = array();
-    
+
     /**
      * Child ErrorStructs that are from this structure. For example, a TOKEN
      * ErrorStruct would contain ATTR ErrorStructs. This is a multi-dimensional
      * array in structure: [TYPE]['identifier']
      */
     public $children = array();
-    
+
     public function getChild($type, $id) {
         if (!isset($this->children[$type][$id])) {
             $this->children[$type][$id] = new HTMLPurifier_ErrorStruct();
@@ -50,9 +50,9 @@ class HTMLPurifier_ErrorStruct
         }
         return $this->children[$type][$id];
     }
-    
+
     public function addError($severity, $message) {
         $this->errors[] = array($severity, $message);
     }
-    
+
 }