Work around Rustfmt bug

Author: Xanewok

tests/client.rs

@@ -1803,6 +1803,8 @@ fn client_reformat_with_range() {
     let formatted = r#"pub fn main() {
     let world1 = "world";
     println!("Hello, {}!", world1);
+
+// Work around rustfmt#3494
 let world2 = "world"; println!("Hello, {}!", world2);
 let world3 = "world"; println!("Hello, {}!", world3);
     }

tests/fixtures/reformat_with_range/src/main.rs

@@ -1,6 +1,8 @@
 pub fn main()
 {
 let world1 = "world"; println!("Hello, {}!", world1);
+
+// Work around rustfmt#3494
 let world2 = "world"; println!("Hello, {}!", world2);
 let world3 = "world"; println!("Hello, {}!", world3);
     }