Use clearfix vs min-height on paras with dropcaps
Use clearfix vs min-height on paras with dropcaps

The min-height was causing weird blank spots on the page when empty
paragraphs matched rules that used the mixin.

By using the clearfix empty paragraphs won't take up any more space than
they should (none).

openstax/tutor-js,openstax/tutor-js,openstax/tutor-js,openstax/tutor-js,openstax/tutor-js