Bless tests.

Author: cjgillot

Diff for: src/test/ui/const-generics/occurs-check/unused-substs-1.stderr

@@ -8,6 +8,9 @@ LL |     let _ = A;
 note: required by a bound in `A`
   --> $DIR/unused-substs-1.rs:9:11
    |
+LL | struct A<const N: usize>
+   |        - required by a bound in this
+LL | where
 LL |     A<N>: Bar<N>;
    |           ^^^^^^ required by this bound in `A`