Allow for-in initializers

[bakkot]

This test is misclassified as of tc39/ecma262#614.

[littledan]

For-in initializers? I thought ES2015 got rid of those. What idiot would put those back in?

(I was!)

[leobalter]

@littledan if that's a joke it is going without a context and it's not fun. I recommend avoiding this tone.

[littledan]

Yes, it was a joke since I was the one to reintroduce it.

[jmdyck]

Yeah, but if the reader doesn't know that, it looks to them like you're calling someone else an idiot. And maybe they think "Ah, it's okay to insult people here."

If, in the same post, you had revealed that "the idiot" was you, then everyone would have realized you were being self-deprecating, and (in my opinion) the joke wouldn't have been a problem.

[littledan]

OK, edited the original comment to include the reveal.