[Bug 78435]

[Max Harmathy]

What was the rational for changing the file name in the first place?
What is wrong with presenting a overwrite warning/question to the user
for equal file names?

Silently changing file names is not very nice in my opinion. At least
there should be an option to disable this mechanism.

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https://bugs.launchpad.net/bugs/78435

Title:
  temporary filenames should handle multiple extensions (.tar.gz)

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