[issue8355] diff.py produce unified format by default

[Stefan Krah]

Stefan Krah <stefan-usenet at bytereef.org> added the comment:

The requirement to remember the "-u" option is a benefit for the user.
If he ever wants to use a standard diff, he doesn't have to relearn
things.

I don't agree that diff.py should be a custom tool. It's unfortunate
that it already deviates from standard diffs, but that's no reason to
deviate further.

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