fix up tidy

Author: KodrAus

src/test/ui/simd/simd-array-trait.rs

@@ -20,7 +20,8 @@ impl Simd for i32x4 {
 
 #[repr(simd)]
 #[derive(Copy, Clone)]
-pub struct T<S: Simd>([S::Lane; S::SIZE]); //~ ERROR constant expression depends on a generic parameter
+pub struct T<S: Simd>([S::Lane; S::SIZE]);
+//~^ ERROR constant expression depends on a generic parameter
 
 extern "platform-intrinsic" {
     fn simd_insert<T, E>(x: T, idx: u32, y: E) -> T;