Turns out this is still needed by Safari 5.1, which we're still supporting.

This reverts commit c4b1da40.

Fix #13315 for IE9: compare typeof xmlNode.method to var instead of literal "undefined" for safer uglification
(cherry picked from commit ec9b38a3)

Stylish yet functional, this set of grunt plugins should provide hours of trouble-free operation until rc6 comes out.

(cherry picked from commit ac93559e)

Ignore file inputs when serializing forms. File input serialization is handled by plugins. Fixes #13306.

Fixes #13276. Unit test is enough since the 2.x XHR transport already dismissed the XML as parsed by the XHR instance.

(cherry picked from commit 37eb6125)

Fix #8335: Avoid memory leak by never setting data on non-element non-document nodes. Close gh-1127.

(cherry picked from commit 6b1b0a26)

(cherry picked from commit 13468aba)