Init multiple editors without html option: textarea contents could get overridden

Actually I have 3 textareas, with different ids and different texts inside. However when I instanciate wym editor every textarea content gets filled with the first textarea content. It does work well with 1.0b3 but not with b5
I think we could. It's asynchronous, but we only care about the second call. I'm a bit fatigued on the back and forth for this ticket, though, so I'm just going to merge it.