old_contents: #!/usr/bin/python2.2
  # Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  
  import md5
  
  """64-bit fingerprint support for strings.
  
  Usage:
      from extern import FP
      print 'Fingerprint is %ld' % FP.FingerPrint('Hello world!')
  """
  
  
  def UnsignedFingerPrint(str, encoding='utf-8'):
    """Generate a 64-bit fingerprint by taking the first half of the md5
    of the string."""
    hex128 = md5.new(str).hexdigest()
    int64 = long(hex128[:16], 16)
    return int64
  
  def FingerPrint(str, encoding='utf-8'):
    fp = UnsignedFingerPrint(str, encoding=encoding)
    # interpret fingerprint as signed longs
    if fp & 0x8000000000000000L:
      fp = - ((~fp & 0xFFFFFFFFFFFFFFFFL) + 1)
    return fp
   
  
new_contents: #!/usr/bin/python
  # Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  
  import md5
  
  """64-bit fingerprint support for strings.
  
  Usage:
      from extern import FP
      print 'Fingerprint is %ld' % FP.FingerPrint('Hello world!')
  """
  
  
  def UnsignedFingerPrint(str, encoding='utf-8'):
    """Generate a 64-bit fingerprint by taking the first half of the md5
    of the string."""
    hex128 = md5.new(str).hexdigest()
    int64 = long(hex128[:16], 16)
    return int64
  
  def FingerPrint(str, encoding='utf-8'):
    fp = UnsignedFingerPrint(str, encoding=encoding)
    # interpret fingerprint as signed longs
    if fp & 0x8000000000000000L:
      fp = - ((~fp & 0xFFFFFFFFFFFFFFFFL) + 1)
    return fp
   
  
subject: Remove version number from Python shebang.