fix typo

git-svn-id: https://plugins.svn.wordpress.org/email-newsletter/trunk@896365 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix changes

git-svn-id: https://plugins.svn.wordpress.org/email-newsletter/trunk@896368 b8457f37-d9ea-0310-8a92-e5e31aec5664