Fixed #13685: Correct the default value for EMAIL_BACKEND listed in t…

…he settings ref.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@13316 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/ref/settings.txt

@@ -616,7 +616,7 @@ EMAIL_BACKEND
 
 .. versionadded:: 1.2
 
-Default: ``'django.core.mail.backends.smtp'``
+Default: ``'django.core.mail.backends.smtp.EmailBackend'``
 
 The backend to use for sending emails. For the list of available backends see
 :ref:`topics-email`.