You make a good point, but as it stands now Tender doesn't
support html. I'd recommend clicking the "original" button at the
top of the discussion to see if the code is viewable there.
Unfortunately the best answer I can give you otherwise is to
teach your users to submit code surrounded by the @@@ (as Tender
uses markdown to format messages). You raise a good point though,
especially for clients who use Tender primarily via email. We may
need to try coming up with a better solution for this