Automattic/_s — pull request #539 by byjml (2014-07-01 20:45:13+00:00)
Title: Use lowercase `doctype`

Since it's [case-insensitive](http://www.whatwg.org/specs/web-apps/current-work/multipage/syntax.html#the-doctype), use all lowercase `` instead of `` to be consistent with the other html tags.