evolve--list: initial implementation This implementation does not work with '-T json' since it needs multiple levels of depth. There is various small issue with the current data, the test coverage is a bit low and the output is likely to change, but this is a good step forward. Sample output: 01a3e66ba030: e (amended) unstable: 1995fc658ad6 (unstable parent) divergent: 84e1c6ae319d d3b90e9c84ab (precursor 3efa43a7427b) divergent: add9a356b8cf (precursor 3efa43a7427b) add9a356b8cf: e (rebased) divergent: 84e1c6ae319d d3b90e9c84ab (precursor 3efa43a7427b) divergent: 01a3e66ba030 (precursor 3efa43a7427b) 84e1c6ae319d: e (e+f split) unstable: 1995fc658ad6 (unstable parent) divergent: 01a3e66ba030 (precursor 3efa43a7427b) divergent: add9a356b8cf (precursor 3efa43a7427b) d3b90e9c84ab: f (e+f split) unstable: 84e1c6ae319d (unstable parent) divergent: 01a3e66ba030 (precursor 3efa43a7427b) divergent: add9a356b8cf (precursor 3efa43a7427b) 8febfaee0dd1: c unstable: 43765473b851 (obsolete parent) bumped: b36d99df9f41 (immutable precursor) 1995fc658ad6: d: commit with a long happy message, ababagalamaga, ababagal... unstable: 8febfaee0dd1 (unstable parent) fa8498ad030f: aa unstable: d3b90e9c84ab (unstable parent)