--- a/relnotes/next	Thu Dec 10 12:06:55 2020 -0800
+++ b/relnotes/next	Thu Dec 10 14:39:22 2020 -0800
@@ -21,7 +21,8 @@
    debugstrip`. The extension remains for compatibility.
 
  * `hg diff` now supports `--from <rev>` and `--to <rev>` arguments as
-   clearer alternatives to `-r <revs>`.
+   clearer alternatives to `-r <revs>`. `-r <revs>` has been
+   deprecated.
 
  * The memory footprint per changeset during pull/unbundle
    operations has been further reduced.