[O] [ox-ascii] Export file overwrites source file

[Sebastien Vauban]

Hello,

As many people, I think, I've also associated Org-mode to .txt files.

Now, with the new exporter, if I export `a.txt' as "plain text", it overwrites
(without notice, BTW) my source file `a.txt': it's lost.

Before, in such a case, the exporter noticed that I already had a file named
`a.txt', hence it named the exported file as `a.txt.txt', what I found to be a
good trade-off.

Shouldn't that behavior be put back in the ASCII exporter?

Best regards,
  Seb

-- 
Sebastien Vauban