Request for fixing API reference (very small bug of doc)

I found a very very small bug and am writing this wishing someone who’s working on it will find this.

In the Chat Completion section, the example response json is not a valid json because it has a following , just before } appears; of course this is valid JavaScript object but not as a JSON data.

Please check choices[0].message.content. It has a following , which is not needed.

Thank you!