Update fn-ret-invariant test assertion

Author: cengiz-io

src/test/compile-fail/associated-types/cache/project-fn-ret-invariant.rs

@@ -61,9 +61,8 @@ fn baz<'a,'b>(x: Type<'a>) -> Type<'static> {
 #[cfg(krisskross)] // two instantiations, mixing and matching: BAD
 fn transmute<'a,'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
    let a = bar(foo, y);
-   let b = bar(foo, x);
+   let b = bar(foo, x); //[krisskross]~ ERROR E0623
    (a, b) //[krisskross]~ ERROR E0623
-   //[krisskross]~^ ERROR E0623
 }
 
 #[rustc_error]