dot in part_number

in imapwu_api-module, line369

imapwu_api_add_part_to_array($p, $partno .".". ($count+1), $part_array);

shouldn't be

imapwu_api_add_part_to_array($p, $partno . ($count+1), $part_array); // without the dot

?

Because in my case:

$attachments = mail_api_get_attachment_overview($message_uid);
echo $attachments[0]["part_number"];

print 1..1 instead of 1.1

Thanks