Fix tests

src/test/ui/const-generics/issue-103243.rs

@@ -33,3 +33,5 @@ where
     {
     }
 }
+
+fn main() {}

src/test/ui/impl-trait/issue-103599.stderr

@@ -7,8 +7,8 @@ LL |
 LL |     wrap(wrap(x))
    |          ------- recursive call site
    |
-   = help: a `loop` may express intention better if this is on purpose
    = note: `#[warn(unconditional_recursion)]` on by default
+   = help: a `loop` may express intention better if this is on purpose
 
 warning: 1 warning emitted