Update reexport-attr-merge rustdoc test

Author: GuillaumeGomez

tests/rustdoc/reexport-attr-merge.rs

@@ -19,9 +19,9 @@ pub use Foo1 as Foo2;
 // First we ensure that only the reexport `Bar2` and the inlined struct `Bar`
 // are inlined.
 // @count - '//a[@class="struct"]' 2
-// Then we check that both `cfg` are displayed.
+// Then we check that `cfg` is displayed for base item, but not for intermediate re-exports.
 // @has - '//*[@class="stab portability"]' 'foo'
-// @has - '//*[@class="stab portability"]' 'bar'
+// @!has - '//*[@class="stab portability"]' 'bar'
 // And finally we check that the only element displayed is `Bar`.
 // @has - '//a[@class="struct"]' 'Bar'
 #[doc(inline)]