GH action: Run rustfmt+cargo autofix when the PR is merged · sylvestre/coreutils@4de5c7f

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

WARNING: `cargo clippy`: unneeded sub `cfg` when there is only one condition

WARNING: `cargo clippy`: unexpected `cfg` condition value: `winapi`

WARNING: `cargo clippy`: unexpected `cfg` condition value: `bitrig`

WARNING: `cargo clippy`: unexpected `cfg` condition value: `bitrig`

WARNING: `cargo clippy`: operator precedence might not be obvious

WARNING: `cargo clippy`: private item shadows public glob re-export

WARNING: `cargo clippy`: casting to the same type is unnecessary (`i32` -> `i32`)

WARNING: `cargo clippy`: this if-then-else expression assigns a bool literal

WARNING: `cargo clippy`: casting to the same type is unnecessary (`u64` -> `u64`)

WARNING: `cargo clippy`: casting to the same type is unnecessary (`u64` -> `u64`)

The ubuntu-18.04 environment is deprecated, consider switching to ubuntu-20.04(ubuntu-latest), or ubuntu-22.04 instead. For more details see https://github.com/actions/virtual-environments/issues/6002

Provide feedback