My /etc/fstab file contains a line for the file system cgroup2 (i.e. for
cgroup v2 instead of cgroup for cgroup v1).  I just learned about
etc-fstab-generic-mode and after loading generic-x and visiting
/etc/fstab, I saw that in the line for cgroup2, the entry in the type
column is fontified in the default face, not in font-lock-keyword-face,
unlike all other file system types in my /etc/fstab file.  This patch
fixes the misfontification: