commit cc78aa6787aa0d17093686f19b96ea1a7080f108
Author: Lee Rowlands <lee.rowlands@previousnext.com.au>
Date:   Sun Aug 3 09:40:54 2014 +1000

    Fail

diff --git a/core/modules/config/src/Tests/ConfigImportUITest.php b/core/modules/config/src/Tests/ConfigImportUITest.php
index 1c301d6..c07f892 100644
--- a/core/modules/config/src/Tests/ConfigImportUITest.php
+++ b/core/modules/config/src/Tests/ConfigImportUITest.php
@@ -281,6 +281,7 @@ function testImportDiff() {
 
     // Load the diff UI and verify that the diff reflects the change.
     $this->drupalGet('admin/config/development/configuration/sync/diff/' . $config_name);
+    $this->assertNoRaw('&amp;nbsp;');
     $this->assertTitle(format_string('View changes of @config_name | Drupal', array('@config_name' => $config_name)));
 
     // Reset data back to original, and remove a key