Subject: document "So how do we just simply make a backup file?"

From: [email-masked]
Date: Thu, 28 Jun 2012 23:30:59 +0800

(info "(coreutils) Backup options") should add some examples, for
"So how do we make a backup file of m?"
$ ls
m
$ cp -b m m #no go
$ cp m n
$ mv -b n m