I've been playing around with enabling "version-control" for backups,
and what I have been noticing is that the ~/.emacs.d/recentf file has
had a lot of backups, far more that regular files that I use. My
understanding is that this happens because recentf currently uses
write-file (that in turn uses the backup'ing save-buffer) instead of
directly writing the temporary buffer to the disk.

This patch does just that, replacing write-file with write-region,
because I argue that an automatically generated file doesn't need
backups.

-- 
	Philip K.