[dom] Pull Request: Add a common conjugation of "case-sensitive"

tabatkins has just submitted a new pull request for 
https://github.com/whatwg/dom:

== Add a common conjugation of "case-sensitive" ==
CSS Syntax also defines these terms, but your definitions are better, 
so I'm removing them from Syntax.  But it also explicitly gives these 
conjugations, because they're used in the spec.

See https://github.com/whatwg/dom/pull/33