Remove trailing whitespace.

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

library/HTMLPurifier/DefinitionCache.php

@@ -10,9 +10,9 @@
  */
 abstract class HTMLPurifier_DefinitionCache
 {
-    
+
     public $type;
-    
+
     /**
      * @param $name Type of definition objects this instance of the
      *      cache will handle.
@@ -20,7 +20,7 @@ abstract class HTMLPurifier_DefinitionCache
     public function __construct($type) {
         $this->type = $type;
     }
-    
+
     /**
      * Generates a unique identifier for a particular configuration
      * @param Instance of HTMLPurifier_Config
@@ -30,7 +30,7 @@ abstract class HTMLPurifier_DefinitionCache
                $config->getBatchSerial($this->type) . ',' .
                $config->get($this->type, 'DefinitionRev');
     }
-    
+
     /**
      * Tests whether or not a key is old with respect to the configuration's
      * version and revision number.
@@ -50,7 +50,7 @@ abstract class HTMLPurifier_DefinitionCache
         ) return true;
         return false;
     }
-    
+
     /**
      * Checks if a definition's type jives with the cache's type
      * @note Throws an error on failure
@@ -64,37 +64,37 @@ abstract class HTMLPurifier_DefinitionCache
         }
         return true;
     }
-    
+
     /**
      * Adds a definition object to the cache
      */
     abstract public function add($def, $config);
-    
+
     /**
      * Unconditionally saves a definition object to the cache
      */
     abstract public function set($def, $config);
-    
+
     /**
      * Replace an object in the cache
      */
     abstract public function replace($def, $config);
-    
+
     /**
      * Retrieves a definition object from the cache
      */
     abstract public function get($config);
-    
+
     /**
      * Removes a definition object to the cache
      */
     abstract public function remove($config);
-    
+
     /**
      * Clears all objects from cache
      */
     abstract public function flush($config);
-    
+
     /**
      * Clears all expired (older version or revision) objects from cache
      * @note Be carefuly implementing this method as flush. Flush must
@@ -102,6 +102,6 @@ abstract class HTMLPurifier_DefinitionCache
      *       should not be repeatedly called by userland code.
      */
     abstract public function cleanup($config);
-    
+
 }