[still giving]

What does this mean in English?

so, to include a reply box on all pages for ajaxed quote, remove this if statement in the same groups/single/forum/topic.php file<?php if ( bp_get_the_topic_is_last_page() ) : ?> (don't forget about the correct<?php endif; ?>)

What does (don't forget about the correct <?php endif; ?>) mean I have to do …

put it in or take it out, and where ?