- make the resulting line the requested number of *characters*, not *bytes*,
- avoid truncuating multi-byte sequences in the middle.
+* shorten the message to sane length:
+
+ Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service failed to load: No such file or directory. See system logs and 'systemctl status display-manager.service' for details.
+
Fedora 20:
* external: ps should gain colums for slice and machine