rails/rails — pull request #5110 by frankieroberto (2012-02-21 11:22:26+00:00)
Title: Adding 'itemscope' to the list of boolean attributes.

Itemscope is defined within HTML5 as a boolean attribute for use in microdata markup. See http://www.whatwg.org/specs/web-apps/current-work/multipage/microdata.html#attr-itemscope