rustfmt fix in test

Author: brody2consult

tests/compiletests/ui/memset_u128_array.rs

@@ -2,7 +2,9 @@
 
 use spirv_std::spirv;
 
-pub fn f() -> [u128; 2] { return [0; 2] }
+pub fn f() -> [u128; 2] {
+    return [0; 2];
+}
 
 #[spirv(fragment)]
 pub fn main() {}