Suppress another 'assertNotIn' FBO Python 2.6.

src/OFS/tests/testFileAndImage.py

@@ -357,8 +357,13 @@ class ImageTests(FileTests):
 class ImagePublishTests(Testing.ZopeTestCase.FunctionalTestCase):
     def testTagSafe(self):
         self.app.manage_addImage("image", "")
-        res = self.publish("/image/tag?height=0&width=0&css_class=%22%3E%3Cscript%20type%3D%22text%2Fjavascript%22%3Ealert('evil')%3B%3C%2Fscript%3E%3Cdiv%20class%3D%22")
-        self.assertNotIn('<script type="text/javascript">alert(\'evil\');</script>', res.getBody())
+        res = self.publish(
+            "/image/tag?height=0&width=0&css_class=%22%3E%3Cscript%20type"
+            "%3D%22text%2Fjavascript%22%3Ealert('evil')%3B%3C%2Fscript"
+            "%3E%3Cdiv%20class%3D%22")
+        self.assertFalse(
+            '<script type="text/javascript">alert(\'evil\');</script>'
+                in res.getBody())
 
 
 def test_suite():