`rustfmt` no longer builds after rust-lang/rust#83813

[rust-highfive]

Hello, this is your friendly neighborhood mergebot.
After merging PR #83813, I observed that the tool rustfmt no longer builds.
A follow-up PR to the repository https://github.com/rust-lang/rustfmt is needed to fix the fallout.

cc @cbeuw, do you think you would have time to do the follow-up work?
If so, that would be great!