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Viewing changes to bzrlib/deprecated_graph.py

Merge up bzr.dev.

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bzrlib/deprecated_graph.py
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        new_lines = set()
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        for line in lines:
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            line_descendants = graph[line]
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            assert line not in line_descendants, "%s refers to itself" % line
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            for descendant in line_descendants:
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                distance = max_distance(descendant, ancestors, distances,
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                                        root_descendants)