It appears that Apple's update to editline in OS X 10.9 Mavericks has also broken this patch; with refreshing, it still works with the system editline in 10.8. So, like the fix for Issue18458, we need to make sure that the fix works with either version of a dynamically loaded libedit.

Zvezdan, it would be good if you would be willing to sign the Python contributor agreement for your patch:  https://www.python.org/psf/contrib/contrib-form/