--- a/mercurial/help/config.txt	Sun Jan 06 15:25:10 2019 -0500
+++ b/mercurial/help/config.txt	Fri Jan 04 20:27:17 2019 +0530
@@ -1806,6 +1806,13 @@
 
 Alias definitions for revsets. See :hg:`help revsets` for details.
 
+``rewrite``
+-----------
+
+``update-timestamp``
+    If true, updates the date and time of the changeset to current. It is only
+    applicable for hg amend in current version.
+
 ``storage``
 -----------