bug#13522: 24.2; save-buffer removes edited file under some conditions

[Glenn Morris]

Vincent Lefevre wrote:

>> I can't reproduce this with 24.2.

I was using a file in /tmp, and apparently Emacs does not make backups
of files in /tmp (normal-backup-enable-predicate; not sure that seems
useful behaviour to me). Using a file in $HOME I can reproduce it.

>> Here I have both "file" and "#file", no "file~".
>
> I have "file~" and "#file#" (with 2 # characters).

(The "#" was just a typo on my part.)