/usr/share/doc/util-linux/examples/filesystems is in util-linux 2.29.2-1+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7
ext4 ext3 vfat hfs hfsplus iso9660 btrfs