Unknown configuration option `fn_params_layout` in rustfmt 1.5.1

[KonradHoeffner]

I use the newest rustfmt release 1.51 included in the Arch Linux rust 1-1.63.0-1 package released on 2022-08-11 but rustfmt does not recognize the fn_params_layout option:

$ cargo --version
cargo 1.63.0
$ rustc --version
rustc 1.63.0 (Arch Linux rust 1:1.63.0-1)
$ rustfmt --version
rustfmt 1.5.1-
$ cargo fmt
Warning: Unknown configuration option `fn_params_layout`

rustfmt.toml

fn_params_layout = "Compressed"

According to the documentation, the fn_params_layout option is stable, so I expect it to be available in stable Rust.

[KonradHoeffner]

P.S.: I later realized that this was renamed from fn_args_layout after the release of rustfmt 1.5.1 and that I was looking at the documentation of the master branch but I will let this issue open because I'm not sure if it is correct that it is marked as "stable" when it is not available in the stable toolchain yet.

[ytmimi]

The fn_params_layout rename has not been released yet. It's only available on master. When checking for configuration values for a certain version of rustfmt I'd recommend looking at https://rust-lang.github.io/rustfmt/