I18n: fix get_comment_date and edit_comment_link in comment-template.php,...

I18n: fix get_comment_date and edit_comment_link in comment-template.php, props tai. Add class to "Says:",  fixes #8142

git-svn-id: https://core.svn.wordpress.org/trunk@9854 1a063a9b-81f0-0310-95a4-ce76da25c4cd