old_contents: # -*- coding: utf-8 -*-
  #------------------------------------------------------------------------------
  #  Package: Pikos toolkit
  #  File: filters/api.py
  #  License: LICENSE.TXT
  #
  #  Copyright (c) 2012, Enthought, Inc.
  #  All rights reserved.
  #------------------------------------------------------------------------------
  from pikos.filters.on_value import OnValue
  from pikos.filters.on_Changle import OnChange
new_contents: # -*- coding: utf-8 -*-
  #------------------------------------------------------------------------------
  #  Package: Pikos toolkit
  #  File: filters/api.py
  #  License: LICENSE.TXT
  #
  #  Copyright (c) 2012, Enthought, Inc.
  #  All rights reserved.
  #------------------------------------------------------------------------------
  from pikos.filters.on_value import OnValue
  from pikos.filters.on_change import OnChange
subject: correct typo