Changed an '== None' to 'is None' in Template.__init__()

git-svn-id: http://code.djangoproject.com/svn/django/trunk@6970 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/template/__init__.py

@@ -159,7 +159,7 @@ class Template(object):
             template_string = smart_unicode(template_string)
         except UnicodeDecodeError:
             raise TemplateEncodingError("Templates can only be constructed from unicode or UTF-8 strings.")
-        if settings.TEMPLATE_DEBUG and origin == None:
+        if settings.TEMPLATE_DEBUG and origin is None:
             origin = StringOrigin(template_string)
             # Could do some crazy stack-frame stuff to record where this string
             # came from...