( )⚙ D11966 simplemerge: make merge_groups() yield only 2-tuples

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simplemerge: make merge_groups() yield only 2-tuples
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Authored by martinvonz on Jan 6 2022, 3:34 PM.

Details

Summary

merge_groups() currently yields 2-tuples or 4-tuples, making the
callers check the first element to decide how to interpret the
rest. Let's make it yield only 2-tuples, thereby simplifying life a
little for the callers.

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