Make single_match clippy happy
Make single_match clippy happy

Signed-off-by: hi-rustin <c7d168847ad25898cad3ce2d480246882ded574b@gmail.com>

nodakai/rustup.rs,rust-lang/rustup,rust-lang/rustup,nodakai/rustup.rs,nodakai/rustup.rs,rust-lang/rustup,nodakai/rustup.rs,rust-lang/rustup,nodakai/rustup.rs,rust-lang/rustup