There appears to be a bug with the [edit] magic link.
Using this text:
###Question needs more information We need more information to answer your question. Please [edit] your post and add details as requested by the community. It will be closed for now, but don't worry - once you have improved the question flag a moderator and it can be reopened. See How do I ask questions here? for general guidelines.
Gives a broken preview:
The comment still inserts OK however.