Update api.md - #992

Thanks for replying.

If you copy the Async/Await API doc with Or, use `async`/`await`: line, Javascript will throw a syntax error in this line, So It would be better if we comment this line to prevent getting an error.

I saw that mistake when our colleagues copied those lines to use. But finally, if you think it's not so good, I will revert.

Any news?

As those aren't code comments, I'd prefer they be outside the code. Generally only code inside code blocks should be treated as being able to be copied 😄

I've uncommented that line. Check it again, please