git: Use the `patience` algorithm for diffs
git: Use the `patience` algorithm for diffs

The default diffs created by git can be quite unreadable. Especially,
when one adds text that includes brackets, such as functions in source
code, the diff gets unreadable very quickly.

The patience algorithm is slower than the default one, but generates
better looking diffs. Because one looks at diffs infrequently (i.e.
not more than 1 diff per second), I believe this trade-off is worth it.

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