I spend a lot of time working in issue trackers (e.g. GitHub), which involves writing a lot of markdown. Sometimes, perhaps I write too much information and it would be nice to allow the person reading to optionally skip some details. Traditionally, I accomplish this with a “Summary” section but now with collapsible sections in GitHub Issues, I can write even tidier comments.
Warning!
This is a draft, not a finalized post. See full draft disclosure.