fmt: apply cargo fmt suggestions

src/benchmark/executor.rs

@@ -1,3 +1,4 @@
+#[cfg(windows)]
 use std::os::windows::process::CommandExt;
 use std::process::ExitStatus;
 
@@ -136,14 +137,7 @@ impl<'a> Executor for ShellExecutor<'a> {
     ) -> Result<(TimingResult, ExitStatus)> {
         let on_windows_cmd = cfg!(windows) && *self.shell == Shell::Default("cmd.exe");
         let mut command_builder = self.shell.command();
-        command_builder
+        command_builder.arg(if on_windows_cmd { "/C" } else { "-c" });
-            .arg(
-                if on_windows_cmd {
-                    "/C"
-                } else {
-                    "-c"
-                },
-            );
 
         // Windows needs special treatment for its behavior on parsing cmd arguments
         if on_windows_cmd {