middleman/middleman-guides — pull request #353 by dgalarza (2014-11-03 21:31:29+00:00)
Title: Nested layouts `wrap_layout` needs to be outputted

In order for `wrap_layout` to properly work, it needs to be outputted to
using `<%=`. It seems that this is something that recently came about
as it previously was not required. I found this while trying to upgrade
a middleman 3.1 site to 3.3.