Making Backups

For details of the variables which control whether and how backup files are made see section Backup Files.

Function: backup-file file-name

When necessary, make a backup of the file file-name. This should be called when the file file-name is about to be overwritten.

Note that this function doesn't define whether or not the file file-name will still exist when this function returns. Sometimes it will, sometimes it won't...

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