Steps to Reproduce:

This edit: https://nl.wikipedia.org/w/index.php?title=Wikipedia:Discussietools&diff=next&oldid=56220699&diffmode=source

Actual Results:
Causes 8 slugs before and 8 slugs after the inserted comment when viewed with VE: https://nl.wikipedia.org/w/index.php?title=Wikipedia:Discussietools&oldid=56220706&veaction=edit
The slugs can't be removed.

Expected Results:
No slugs before and no slugs after.
Possibility to remove slugs.
An option to increase or decrease indentation level.