Set the Vim file type for Systemd files.

roles/debian_server/files/update.service

+# vim: filetype=systemd
 [Unit]
 Description=Background system updates
 ConditionACPower=true

roles/debian_server/files/update.timer

+# vim: filetype=systemd
 [Unit]
 Description=Background system updates
 

roles/kodi/files/kodi.service

+# vim: filetype=systemd
 [Unit]
 Description=Kodi Media Center on %i
 After=systemd-user-sessions.service sound.target network-online.target xorg.service

roles/kodi/files/xorg.service

+# vim: filetype=systemd
 [Unit]
 Description=X Windows display server
 After=systemd-user-sessions.service