clippy2 solution

exercises/22_clippy/clippy2.rs

@@ -1,8 +1,10 @@
 fn main() {
     let mut res = 42;
     let option = Some(12);
+    // TODO: Fix the Clippy lint.
     for x in option {
         res += x;
     }
-    println!("{}", res);
+
+    println!("{res}");
 }