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'bzrlib.repofmt.groupcompress_repo.RepositoryFormatCHK2',
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help='pack-1.9 with 255-way hashed CHK inv, bencode revision, group compress, '
3884
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'rich roots. Please read '
3887
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branch_format='bzrlib.branch.BzrBranchFormat7',
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tree_format='bzrlib.workingtree.WorkingTreeFormat6',