madrobby/zepto — pull request #675 by redexp (2013-01-10 16:46:38+00:00)
Title: .trigger() and .triggerHandler() added default value for "data" argument

If I will call do like this

node.triggerHandler('click')

then handlers will have not one argument (event), but two: event and undefined, because in proxy method of handler you concatenate [event].concat(event.data)

event.data should be array in any case