120 several revisions may be fixed in parallel. Writes to the working copy are not

   120 several revisions may be fixed in parallel. Writes to the working copy are not

   121 amended into the revision being fixed; fixer tools should always write fixed

   121 amended into the revision being fixed; fixer tools should always write fixed

   122 file content back to stdout as documented above.

   122 file content back to stdout as documented above.

   123 """

   123 """

   124 

   124 

   126 

   125 

   127 import collections

   126 import collections

   128 import itertools

   127 import itertools

   129 import os

   128 import os

   130 import re

   129 import re