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-rw-r--r--tests/rustdoc/impl-ref-20175.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/rustdoc/impl-ref-20175.rs b/tests/rustdoc/impl-ref-20175.rs
index 5b38ab91af9..a92db2d0a66 100644
--- a/tests/rustdoc/impl-ref-20175.rs
+++ b/tests/rustdoc/impl-ref-20175.rs
@@ -1,3 +1,5 @@
+// https://github.com/rust-lang/rust/issues/20175
+
 #![crate_name="issue_20175"]
 
 pub trait Foo {