Add regression test for rust-lang#93205

This issue was most likely fixed by rust-lang#93805.

src/test/rustdoc/intra-doc/assoc-reexport-super.rs

@@ -0,0 +1,20 @@
+// Regression test for #93205
+
+#![crate_name = "foo"]
+
+mod generated {
+    pub struct MyNewType;
+    impl MyNewType {
+        pub const FOO: Self = Self;
+    }
+}
+
+pub use generated::MyNewType;
+
+mod prelude {
+    impl super::MyNewType {
+        /// An alias for [`Self::FOO`].
+        // @has 'foo/struct.MyNewType.html' '//a[@href="struct.MyNewType.html#associatedconstant.FOO"]'
+        pub const FOO2: Self = Self::FOO;
+    }
+}