Fix directive markup
diff --git a/Doc/library/email.policy.rst b/Doc/library/email.policy.rst
index 157f692..a77e510 100644
--- a/Doc/library/email.policy.rst
+++ b/Doc/library/email.policy.rst
@@ -4,7 +4,7 @@
 .. module:: email.policy
    :synopsis: Controlling the parsing and generating of messages
 
-.. versionadded: 3.3
+.. versionadded:: 3.3
 
 
 The :mod:`email` package's prime focus is the handling of email messages as