style: run cargo fmt to satisfy rustfmt CI check

Author: tangaac

build.rs

@@ -229,9 +229,7 @@ fn can_compile<T: AsRef<str>>(test: T) -> bool {
     // Use `RUSTC_WRAPPER` if it's set, unless it's set to an empty string, as
     // documented [here].
     // [here]: https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-reads
-    let wrapper = var("RUSTC_WRAPPER")
-        .ok()
-        .filter(|w| !w.is_empty());
+    let wrapper = var("RUSTC_WRAPPER").ok().filter(|w| !w.is_empty());
 
     let mut cmd = if let Some(wrapper) = wrapper {
         let mut cmd = std::process::Command::new(wrapper);