Is it possible to use rustfmt 2.0 from rustup?

[TennyZhuang]

How about add a component such as rustfmt-preview?

[calebcartwright]

Thanks for your question, but the answer is no on both fronts.

The 2.0 version was never anything more than experimental branch in source control and should be treated as such. It's unlikely to ever become official, and we're not going to go down any official (preview or otherwise) release channels, including rustup, unless that changes.

More info in #5018