twbs/bootstrap — pull request #15072 by hnrch02 (2014-11-10 19:02:19+00:00)
Title: HTML validation: No longer relax the `X-UA-Compatible` error

The validator no longer complains about it unless the value is different from `content=IE=edge`, see https://www.w3.org/Bugs/Public/show_bug.cgi?id=27091