Add regression test for #109282

Author: GuillaumeGomez

tests/rustdoc-ui/issue-109282-import-inline-merge.rs

@@ -0,0 +1,14 @@
+// Regression test for <https://github.com/rust-lang/rust/issues/109282>.
+// Import for `ValueEnum` is inlined and doc comments on the import and `ValueEnum` itself are
+// merged. After the merge they still have correct parent scopes to resolve both `[ValueEnum]`.
+
+// check-pass
+
+mod m {
+    pub enum ValueEnum {}
+}
+mod m2 {
+    /// [`ValueEnum`]
+    pub use crate::m::ValueEnum;
+}
+pub use m2::ValueEnum;