Documentation: nfsroot.rst: COSMETIC: refill a paragraph

In order to use a diskless system, such as an X-terminal or printer server

for example, it is necessary for the root filesystem to be present on a

non-disk device. This may be an initramfs (see Documentation/filesystems/ramfs-rootfs-initramfs.txt),

a ramdisk (see Documentation/admin-guide/initrd.rst) or a

filesystem mounted via NFS. The following text describes on how to use NFS

for the root filesystem. For the rest of this text 'client' means the

diskless system, and 'server' means the NFS server.

In order to use a diskless system, such as an X-terminal or printer server for

example, it is necessary for the root filesystem to be present on a non-disk

device. This may be an initramfs (see

Documentation/filesystems/ramfs-rootfs-initramfs.txt), a ramdisk (see

Documentation/admin-guide/initrd.rst) or a filesystem mounted via NFS. The

following text describes on how to use NFS for the root filesystem. For the rest

of this text 'client' means the diskless system, and 'server' means the NFS

server.