Vue 2 does not chain event listeners like Vue 1

[frankdugan3]

Vue.js version

2.0.0-rc.2

Reproduction Link

Vue 1: https://jsfiddle.net/pkb7gnxu/
Vue 2: https://jsfiddle.net/xmqmqem0/1/

Steps to reproduce

The examples chain key listeners in Vue 1 and Vue 2: @keydown.enter.tab.prevent="incEvents"

Click in the input field, then press either tab or enter in both examples. Vue 2 does not behave the same as Vue 1.

What is Expected?

Vue 2 should chain listeners like Vue 1, or warn about bad syntax if that feature is deprecated.

What is actually happening?

Vue 2 ignores the events.