old_contents: import runpy
  
  runpy.run_module('announce', run_name='__main__', alter_sys=True)
  
new_contents: # Copyright (c) Microsoft Corporation. All rights reserved.
  # Licensed under the MIT License.
  
  import runpy
  
  runpy.run_module('announce', run_name='__main__', alter_sys=True)
  
subject: Add Microsoft copyright header