new_contents: #!/usr/bin/python
  #
  # Copyright 2014 Google Inc. All rights reserved.
  # 
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  # 
  #     http://www.apache.org/licenses/LICENSE-2.0
  # 
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  # Contributors: Rod Sheeter (rsheeter google com)
  #
  # Converts a .nam file to a list of ranges.
  
  import sys
  import tokenize
  
  if len(sys.argv) != 2:
    print "Usage: rangify <nam file>"
    sys.exit(1)
  
  def handle_num(type, token, (srow, scol), (erow, ecol), line):
    global cps
    if type == tokenize.NUMBER:
      cps.append(int(token, 16))
  
  cps = []
  tokenize.tokenize(open(sys.argv[1]).readline, handle_num)
  cps.sort()
  
  seqs = []
  seq = (None,)
  for cp in cps:
    if seq[0] is None:
      seq = (cp,cp)
    elif seq[1] == cp - 1:
      seq = (seq[0], cp)
    else:
      seqs.append(seq)
      seq = (None,)
  
  for seq in seqs:
    print seq
  
subject: Add back tool/rangify.py from hg repo