Brett on 21 Oct, 2016 06:57 PM
meaning it doesn't affect the original markup. This was a reasonable
solution as most people using the format at the time were just
previewing documents that would be used on GitHub and stored as
Markdown. The lists work in PDF export and print, but not HTML export.
Given the increased adoption of the checklist format outside of GitHub,
I'll consider adding handling into the original processing. In the
meantime, a preprocessor _could_ do it, searching for the "- [ ]" format
and inserting HTML for input checkboxes. I could help you write
something for this if needed.