old_contents: from .unittest import UnitTestPlugin as PLUGIN_CLASS
  
new_contents: # -*- coding:utf-8 -*-
  # -----------------------------------------------------------------------------
  # Copyright (c) Spyder Project Developers
  #
  # Licensed under the terms of the MIT License
  # (see spyder/__init__.py for details)
  # -----------------------------------------------------------------------------
  """Spyder unitest plugin."""
  
  # Local imports
  from .unittest import UnitTestPlugin as PLUGIN_CLASS
  
  VERSION_INFO = (0, 1, 0, 'dev0')
  __version__ = '.'.join(map(str, VERSION_INFO))
  
subject: Add version information and header