--- a/relnotes/next	Wed Feb 26 10:54:17 2020 -0800
+++ b/relnotes/next	Wed Feb 26 11:00:50 2020 -0800
@@ -65,5 +65,8 @@
  * `hg.merge()` has lost its `abort` argument. Please call
    `hg.abortmerge()` directly instead.
 
+ * `hg.merge()` has lost its `mergeforce` argument. It should have
+   only ever been called with the same value as the `force` argument.
+
  * The `*others` argument of `cmdutil.check_incompatible_arguments()`
    changed from being varargs argument to being a single collection.