freebsd-update not updating /usr/src/UPDATING

[Vick Khera]

For many years now, I've been managing my FreeBSD servers right from source
(since 4.11 days). I'm now re-booting the way I manage my server since I
now only have one to worry about instead of dozens, and I want to do it
using binary updates and packages for everything. I do still want
up-to-date source tree for reference and to build a customized kernel.

To that end, I'm using freebsd-update to manage the binary and source
components. It appears that my source tree is updated, however the UPDATING
file itself is not updated. I checked the /var/db/freebsd-update contents
and I do not see any reference to patching this file.

Is that an oversight or is that just not expected to get patched? As it
stands right now, my source tree is for 11.1-p1 but the UPDATING file has
no notes on it. This seems inconsistent to me.