Remove trailing whitespace.

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

tests/HTMLPurifier/ErrorCollectorEMock.php

@@ -7,28 +7,28 @@ generate_mock_once('HTMLPurifier_ErrorCollector');
  */
 class HTMLPurifier_ErrorCollectorEMock extends HTMLPurifier_ErrorCollectorMock
 {
-    
+
     private $_context;
     private $_expected_context = array();
     private $_expected_context_at = array();
-    
+
     public function prepare($context) {
         $this->_context = $context;
     }
-    
+
     public function expectContext($key, $value) {
         $this->_expected_context[$key] = $value;
     }
     public function expectContextAt($step, $key, $value) {
         $this->_expected_context_at[$step][$key] = $value;
     }
-    
+
     public function send($v1, $v2) {
         // test for context
         $context = SimpleTest::getContext();
         $test = $context->getTest();
         $mock = $this->mock;
-        
+
         foreach ($this->_expected_context as $key => $value) {
             $test->assertEqual($value, $this->_context->get($key));
         }
@@ -42,6 +42,6 @@ class HTMLPurifier_ErrorCollectorEMock extends HTMLPurifier_ErrorCollectorMock
         $args = func_get_args();
         $mock->invoke('send', $args);
     }
-    
+
 }