[issue8355] diff.py produce unified format by default

[Brian Curtin]

Brian Curtin <curtin at acm.org> added the comment:

I'm with Eric, -0. I don't really think the change is necessary.

----------
nosy: +brian.curtin

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8355>
_______________________________________