yeoman/grunt-usemin — pull request #491 by timhettler (2014-11-14 19:54:04+00:00)
Title: Srcset regex should match any valid image candidate string

I've rewritten the regex to match any valid image candidate string, as per the WHATWG HTML Standard (https://html.spec.whatwg.org/multipage/embedded-content.html#image-candidate-string)