Comment 2 for bug 1693948

Looking at manpages for previous releases of Ubuntu they all contain the same information about --full for journalctl. I did find lines being ellipsized in a DpkgTerminalLog.txt file. Is that what you were looking at? An example:

Instalowanie nowej wersji pliku konfiguracyjnego /etc/apparmor.d/abstractions/libvirt-qemu ...
Setting up libvirt-daemon dnsmasq configuration.
● dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server
   Loaded: loaded (/lib/systemd/system/dnsmasq.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Tue 2017-03-07 13:07:21 CET; 44ms ago
  Process: 1289 ExecStart=/etc/init.d/dnsmasq systemd-exec (code=exited, status=2)
  Process: 1272 ExecStartPre=/usr/sbin/dnsmasq --test (code=exited, status=0/SUCCESS)
      CPU: 25ms

mar 07 13:07:21 Leoo-G5 systemd[1]: Starting dnsmasq - A lightweight DHCP and caching DNS server...
mar 07 13:07:21 Leoo-G5 dnsmasq[1272]: dnsmasq: syntax check OK.
mar 07 13:07:21 Leoo-G5 dnsmasq[1289]: dnsmasq: failed to create listening socket for 127.0.0.1: Address al… in use
mar 07 13:07:21 Leoo-G5 systemd[1]: dnsmasq.service: Control process exited, code=exited status=2
mar 07 13:07:21 Leoo-G5 systemd[1]: Failed to start dnsmasq - A lightweight DHCP and caching DNS server.
mar 07 13:07:21 Leoo-G5 systemd[1]: dnsmasq.service: Unit entered failed state.
mar 07 13:07:21 Leoo-G5 systemd[1]: dnsmasq.service: Failed with result 'exit-code'.
Hint: Some lines were ellipsized, use -l to show in full.