message: fix(transition): should trigger transition hooks for v-show in ie9
  fix
diff: /* @flow */
  -import { isIE9 } from 'core/util/env'
  import { enter, leave } from '../modules/transition'
  // recursively search for possible transition defined inside the component root
  @@ -16,7 +15,7 @@ export default {
  const transition = vnode.data && vnode.data.transition
  const originalDisplay = el.__vOriginalDisplay =
  el.style.display === 'none' ? '' : el.style.display
  - if (value && transition && !isIE9) {
  + if (value && transition) {
  vnode.data.show = true
  enter(vnode, () => {
  el.style.display = originalDisplay
  @@ -31,7 +30,7 @@ export default {
  if (value === oldValue) return
  vnode = locateNode(vnode)
  const transition = vnode.data && vnode.data.transition
  - if (transition && !isIE9) {
  + if (transition) {
  vnode.data.show = true
  if (value) {
  enter(vnode, () => {
  