Created by: cvrebert
See:
- https://github.com/h5bp/html5-boilerplate/commit/57be193031b95b003b96efe9eba7a4db7f58f4e1
- https://github.com/h5bp/html5-boilerplate/issues/1477
Might help out with #12078 (closed).
I've left the top & bottom margins in for now, but they weren't in the h5bp code to begin with; we added them in 54561f11, but I'm not sure why. Do we still need them?
/to @mdo for review.