Show ‘add comment’ link for status updates in Twenty Thirteen

Open up the /wp-content/themes/twentythirteen/functions.php file and change the line

$format_prefix = ( has_post_format( 'chat' ) || has_post_format( 'status' ) ) ? _x( '%1$s on %2$s', '1: post format name. 2: date', 'twentythirteen' ): '%2$s';

to

$format_prefix = ( has_post_format( 'chat' ) || has_post_format( 'status' ) ) ? _x( '%1$s on %2$s - show/leave comments', '1: post format name. 2: date', 'twentythirteen' ): '%2$s';