message: Clippy after rustup
diff: @@ -76,7 +76,7 @@ pub fn setup(subcommand: &MiriCommand, host: &str, target: &str) {
  show_error!("xargo is too old; please upgrade to the latest version")
  }
  let mut cmd = cargo();
  - cmd.args(&["install", "xargo"]);
  + cmd.args(["install", "xargo"]);
  ask_to_run(cmd, ask_user, "install a recent enough xargo");
  }
  @@ -93,7 +93,7 @@ pub fn setup(subcommand: &MiriCommand, host: &str, target: &str) {
  None => {
  // Check for `rust-src` rustup component.
  let output = miri_for_host()
  - .args(&["--print", "sysroot"])
  + .args(["--print", "sysroot"])
  .output()
  .expect("failed to determine sysroot");
  if !output.status.success() {
  @@ -110,7 +110,7 @@ pub fn setup(subcommand: &MiriCommand, host: &str, target: &str) {
  if !rustup_src.join("std").join("Cargo.toml").exists() {
  // Ask the user to install the `rust-src` component, and use that.
  let mut cmd = Command::new("rustup");
  - cmd.args(&["component", "add", "rust-src"]);
  + cmd.args(["component", "add", "rust-src"]);
  ask_to_run(
  cmd,
  ask_user,
  @@ -136,7 +136,7 @@ pub fn setup(subcommand: &MiriCommand, host: &str, target: &str) {
  let dirs = directories::ProjectDirs::from("org", "rust-lang", "miri").unwrap();
  let dir = dirs.cache_dir();
  if !dir.exists() {
  - fs::create_dir_all(&dir).unwrap();
  + fs::create_dir_all(dir).unwrap();
  }
  // The interesting bit: Xargo.toml (only needs content if we actually need std)
  let xargo_toml = if std::env::var_os("MIRI_NO_STD").is_some() {
  @@ -178,8 +178,8 @@ path = "lib.rs"
  // Now invoke xargo.
  let mut command = xargo_check();
  command.arg("check").arg("-q");
  - command.current_dir(&dir);
  - command.env("XARGO_HOME", &dir);
  + command.current_dir(dir);
  + command.env("XARGO_HOME", dir);
  command.env("XARGO_RUST_SRC", &rust_src);
  // We always need to set a target so rustc bootstrap can tell apart host from target crates.
  command.arg("--target").arg(target);
  