[ticket/9556] Drop php closing tags, add trailing newline

Closing tags converted using Oleg's script.
remove-php-end-tags.py -a .

Trailing newlines added using the following where $ext is file extension.
find . -type f -name "*.$ext" -print | xargs printf "e %s\nw\n" | ed -s;

Extensions: php, css, html, js, xml.

PHPBB3-9556

phpBB/includes/mcp/mcp_topic.php

@@ -638,5 +638,3 @@ function merge_posts($topic_id, $to_topic_id)
 		trigger_error($user->lang[$success_msg] . '<br /><br />' . $return_link);
 	}
 }
-
-?>