1 files changed, 15 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/source/issue_4057.rs b/src/tools/rustfmt/tests/source/issue_4057.rs
new file mode 100644
index 000000000..7cd80734b
--- /dev/null
+++ b/src/tools/rustfmt/tests/source/issue_4057.rs
@@ -0,0 +1,15 @@
+// rustfmt-format_code_in_doc_comments: true
+
+/// ```
+/// # #[rustversion::since(1.36)]
+/// # fn dox() {
+/// # use std::pin::Pin;
+/// # type Projection<'a> = &'a ();
+/// # type ProjectionRef<'a> = &'a ();
+/// # trait Dox {
+/// fn   project_ex (self: Pin<&mut Self>) -> Projection<'_>;
+/// fn   project_ref(self: Pin<&Self>) -> ProjectionRef<'_>;
+/// # }
+/// # }
+/// ```
+struct Foo;