This looks good to me.
I wonder what happens if there is no external diff tool that we can use. Does external_diff() fail gracefully?
Similarly, not all external diff tools might display the function name.
We should probably also protect the test with a feature that checks if a functional external diff is available.
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This looks good to me.
I wonder what happens if there is no external diff tool that we can use. Does external_diff() fail gracefully?
Similarly, not all external diff tools might display the function name.
We should probably also protect the test with a feature that checks if a functional external diff is available.