Auto merge of #21440 - kingdido999:rustfmt/atoms, r=jdm

Format components atoms

<!-- Please describe your changes on the following line: -->

```bash
rustfmt components/atoms/*.rs
```

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix a part of #21373 .
- [x] These changes do not require tests because it's code format change.

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components/atoms/build.rs

@@ -10,7 +10,8 @@ use std::io::{BufReader, BufRead};
 use std::path::Path;
 
 fn main() {
-    let static_atoms = Path::new(&env::var_os("CARGO_MANIFEST_DIR").unwrap()).join("static_atoms.txt");
+    let static_atoms =
+        Path::new(&env::var_os("CARGO_MANIFEST_DIR").unwrap()).join("static_atoms.txt");
     let static_atoms = BufReader::new(File::open(&static_atoms).unwrap());
     let mut atom_type = string_cache_codegen::AtomType::new("Atom", "atom!");