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)