#18584: s/testcleanup/testsetup/ until we switch to Sphinx 1.1.

testcleanup directive is new as of 1.1, and we are currently running
1.0.7.  But using testsetup works just as well, and avoids the
unknown directive error when building the docs.
diff --git a/Doc/library/email.policy.rst b/Doc/library/email.policy.rst
index d85054a..54ebb1c 100644
--- a/Doc/library/email.policy.rst
+++ b/Doc/library/email.policy.rst
@@ -85,7 +85,7 @@
    >>> p.stdin.close()
    >>> rc = p.wait()
 
-.. testcleanup::
+.. testsetup::
 
    >>> mymsg.close()
    >>> mocker.stop()