Pass the comment object to the get_comment_date and get_comment_time.

props SergeyBiryukov.
fixes #19849.

Built from https://develop.svn.wordpress.org/trunk@27283


git-svn-id: http://core.svn.wordpress.org/trunk@27139 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use placeholders in strings in wp_sprintf_l() to ensure spaces are not lost in translation.

props andy.
fixes #26651.

Built from https://develop.svn.wordpress.org/trunk@27284


git-svn-id: http://core.svn.wordpress.org/trunk@27140 1a063a9b-81f0-0310-95a4-ce76da25c4cd