/etc/hosts.pacnew

General system Kernel, boot, graphics & hardware
1

The update installed a new /etc/hosts.pacnew file.

How should the new hosts file looke like ?

# Static table lookup for hostnames.
# See hosts(5) for details.
127.0.0.1        localhost
::1              localhost
2
3

Unless you have changed something in the hosts file what you posted should be fine.