Add regression test for #110698

Author: GuillaumeGomez

tests/rustdoc/inline_cross/auxiliary/repr.rs

@@ -0,0 +1,4 @@
+#[repr(C)]
+pub struct Foo {
+    field: u8,
+}

tests/rustdoc/inline_cross/repr.rs

@@ -0,0 +1,13 @@
+// Regression test for <https://github.com/rust-lang/rust/issues/110698>.
+// This test ensures that the re-exported items still have the `#[repr(...)]` attribute.
+
+// aux-build:repr.rs
+
+#![crate_name = "foo"]
+
+extern crate repr;
+
+// @has 'foo/struct.Foo.html'
+// @has - '//*[@class="rust item-decl"]//*[@class="code-attribute"]' '#[repr(C)]'
+#[doc(inline)]
+pub use repr::Foo;