fixed readme test6

git-svn-id: https://plugins.svn.wordpress.org/esse-captcha/trunk@834947 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed readme test7

git-svn-id: https://plugins.svn.wordpress.org/esse-captcha/trunk@834949 b8457f37-d9ea-0310-8a92-e5e31aec5664