4 // 1. The space content is one way to avoid an Opera bug when the
5 // contenteditable attribute is included anywhere else in the document.
6 // Otherwise it causes space to appear at the top and bottom of elements
7 // that are clearfixed.
8 // 2. The use of `table` rather than `block` is only necessary if using
9 // `:before` to contain the top-margins of child elements.
11 // Source: http://nicolasgallagher.com/micro-clearfix-hack/