Big problem.... i applied the change and saved the gedit document then rebooted. It passed the Lenovo logo stage as usual and then hit a blank screen with tiny text in top left corner saying:
You are in emergency mode. After logging in, type "journalctl -xb" to view
system logs, "systemctl reboot" to reboot, "systemctl default" or "exit"
to boot into default mode.
Press enter for maintenance
(or press Control-D to continue):
I press Ctrl + D
It then says:
Reloading system manager configuration
Starting default target
Failed to start default target: Transaction for graphical.target/start is destructive (emergency.target has 'start' job queued, but 'stop' is included in transaction).
The text is tiny. There is nothing I can do to get out of this from what I can see. If I manually shut down and restart the same appears. I've had to pull out a spare computer to write this.