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-rw-r--r--src/libcore/cmp.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcore/cmp.rs b/src/libcore/cmp.rs
index 64e37ec5a56..72ff9cca9fd 100644
--- a/src/libcore/cmp.rs
+++ b/src/libcore/cmp.rs
@@ -96,6 +96,7 @@ use self::Ordering::*;
 /// For example, let's tweak our previous code a bit:
 ///
 /// ```
+/// // The derive implements <BookFormat> == <BookFormat> comparisons
 /// #[derive(PartialEq)]
 /// enum BookFormat {
 ///     Paperback,