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Merge bzr.dev

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bzrlib/annotate.py
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    prevanno=''
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    annotation = list(_annotate_file(branch, rev_id, file_id))
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    max_origin_len = max(len(origin) for origin in set(x[1] for x in annotation))
 
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    if len(annotation) == 0:
 
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        max_origin_len = 0
 
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    else:
 
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        max_origin_len = max(len(origin) for origin in set(x[1] for x in annotation))
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    for (revno_str, author, date_str, line_rev_id, text ) in annotation:
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        if verbose:
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            anno = '%5s %-*s %8s ' % (revno_str, max_origin_len, author, date_str)