Fix bb parser

[uscki-gogs-to-github-migrator]

_{This issue was originally created by @blackwolf12333 on Monday 24 April 2017 at 16:46:55 and later updated on Sunday 02 September 2018 at 18:44:23}

Onder andere section werkt niet goed want de invisible span zorgt ervoor dat de bb code van binnen de section verdwijnt