fix regression test

Author: lolbinarycat

tests/rustdoc/reexport/auxiliary/wrap-unnamable-type.rs

@@ -4,7 +4,7 @@ pub trait Assoc {
 
 pub struct Foo(<Foo as crate::Assoc>::Ty);
 
-const _: () = {
+const _X: () = {
     impl crate::Assoc for Foo {
         type Ty = Bar;
     }

tests/rustdoc/reexport/wrapped-unnamble-type-143222.rs

@@ -2,11 +2,15 @@
 //@ aux-build:wrap-unnamable-type.rs
 //@ build-aux-docs
 
+// regression test for https://github.com/rust-lang/rust/issues/143222
+// makes sure normalizing docs does not cause us to link to unnamable types
+// in cross-crate reexports.
+
 #![crate_name = "foo"]
 
 extern crate wrap_unnamable_type as helper;
-//extern crate helper;
+
 //@ has 'foo/struct.Foo.html'
-//@ !hasraw - '_/struct.Bar.html'
+//@ !hasraw - 'struct.Bar.html'
 #[doc(inline)]
 pub use helper::Foo;