mercurial/configitems.py

--- a/mercurial/configitems.py	Thu Dec 03 14:39:39 2020 -0800
+++ b/mercurial/configitems.py	Sat Dec 05 23:35:55 2020 +0100
@@ -1079,6 +1079,11 @@
 )
 coreconfigitem(
     b'experimental',
+    b'single-head-per-branch:public-changes-only',
+    default=False,
+)
+coreconfigitem(
+    b'experimental',
     b'sshserver.support-v2',
     default=False,
 )