[MERGE] Replace all uses of compare_tress with Tree.changes_from.

[Robert Collins]

So this patch replaces all the callers of compare_trees.

 builtins.py                                              |   12 ++----
 bundle/serializer/v08.py                                 |    3 -
 commit.py                                                |    2 -
 delta.py                                                 |    4 +-
 diff.py                                                  |    8 ++--
 info.py                                                  |    4 +-
 merge.py                                                 |    6 +--
 missing.py                                               |    3 -
 repository.py                                            |    2 -
 status.py                                                |    3 -
 tests/blackbox/test_merge.py                             |    4 --
 tests/blackbox/test_versioning.py                        |   29
++++++---------
 tests/repository_implementations/test_fileid_involved.py |    3 -
 tests/repository_implementations/test_repository.py      |    5 +-
 tests/test_bundle.py                                     |    6 +--
 15 files changed, 39 insertions(+), 55 deletions(-)

-- 
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