github/markup — pull request #176 by kei-s (2012-12-25 08:50:00+00:00)
Title: Render only content by Asciidoctor

From 320e6e081efcf27c087888de6d9e6eec6cf0e80, asciidoc is rendered by erebor/asciidoctor.

`Asciidoctor::Document.new(content).render` include header and footer document.
This pull-req fix it and adjust test.