Remove trailing whitespace.

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

library/HTMLPurifier/VarParser/Native.php

@@ -7,11 +7,11 @@
  */
 class HTMLPurifier_VarParser_Native extends HTMLPurifier_VarParser
 {
-    
+
     protected function parseImplementation($var, $type, $allow_null) {
         return $this->evalExpression($var);
     }
-    
+
     protected function evalExpression($expr) {
         $var = null;
         $result = eval("\$var = $expr;");
@@ -20,6 +20,6 @@ class HTMLPurifier_VarParser_Native extends HTMLPurifier_VarParser
         }
         return $var;
     }
-    
+
 }