~bzr-pqm/bzr/bzr.dev

- remove dead code for cmd_compare_trees
- compare_trees new parameter want_unchanged to avoid allocating
strings if not needed

added added

removed removed

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if verbose:

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this_tree = branch.revision_tree(revision_id)

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delta = compare_trees(prev_tree, this_tree)

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delta = compare_trees(prev_tree, this_tree, want_unchanged=False)

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delta.show(to_file, show_ids)

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prev_tree = this_tree

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