--- a/mercurial/help/config.txt Thu Jun 15 15:13:18 2017 -0700
+++ b/mercurial/help/config.txt Wed Jun 14 20:56:34 2017 -0400
@@ -2093,6 +2093,15 @@
on all exceptions, even those recognized by Mercurial (such as
IOError or MemoryError). (default: False)
+``tweakdefaults``
+
+ By default Mercurial's behavior changes very little from release
+ to release, but over time the recommended config settings
+ shift. Enable this config to opt in to get automatic tweaks to
+ Mercurial's behavior over time. This config setting will have no
+ effet if ``HGPLAIN` is set or ``HGPLAINEXCEPT`` is set and does
+ not include ``tweakdefaults``. (default: False)
+
``username``
The committer of a changeset created when running "commit".
Typically a person's name and email address, e.g. ``Fred Widget