layout/save/GNU/Linux/23_filesystem_layout.sh bug on Fedora with
the Maximum Mount Count whuch was empty on Fedora (on SLES, Ubuntu the code seemed to work with grep -oi);
$ sudo tune2fs -l /dev/vda1  | tr -d '[:blank:]' | grep -oi 'Maximummountcount:[0-9]*'
Maximummountcount:
$ sudo tune2fs -l /dev/vda1  | tr -d '[:blank:]' | grep -i 'Maximummountcount:[0-9]*'
Maximummountcount:-1
--> fix is to to remove -o option with grep and it works on all distro's tested.