For me it's a <a href="http://en.wikipedia.org/wiki/Broken_windows_theory">broken windows theory</a>, we have <a href="https://github.com/jquery/jquery/commit/537e9ced6164074c32df429bb1fa4c30361aa711#diff-88a56f1f55071a6c4f005ef5be83f595R205">this</a> <a href="https://github.com/jquery/jquery/commit/537e9ced6164074c32df429bb1fa4c30361aa711#diff-88a56f1f55071a6c4f005ef5be83f595R188">all over the place</a> in our tests or in test relevant code so i try to not even notice it, plus we don't check them, because amount of this stuff is overwhelming, so this kind thing is bound to happen.