diff -r 018acb7a3490 -r ba064f95175e mercurial/ui.py
--- a/mercurial/ui.py	Fri Mar 22 12:28:59 2019 -0400
+++ b/mercurial/ui.py	Fri Mar 22 12:30:05 2019 -0400
@@ -100,7 +100,10 @@
 # uncomment the lines below to enable some popular extensions
 # (see 'hg help extensions' for more info)
 #
-# churn =
+# histedit =
+# rebase =
+# shelve =
+# uncommit =
 """,
 
     'cloned':