old_contents: """
  Shim to maintain backwards compatibility with old IPython.html imports.
  """
  # Copyright (c) IPython Development Team.
  # Distributed under the terms of the Modified BSD License.
  
  import sys
  from warnings import warn
  
  warn("The `IPython.html` package has been deprecated. "
       "You should import from jupyter_notebook instead.")
  
  from IPython.utils.shimmodule import ShimModule
  
  sys.modules['IPython.html'] = ShimModule(
      src='IPython.html', mirror='jupyter_notebook')
  
  if __name__ == '__main__':
      from jupyter_notebook import notebookapp as app
      app.launch_new_instance()
  
new_contents: """
  Shim to maintain backwards compatibility with old IPython.html imports.
  """
  # Copyright (c) IPython Development Team.
  # Distributed under the terms of the Modified BSD License.
  
  import sys
  from warnings import warn
  
  warn("The `IPython.html` package has been deprecated. "
       "You should import from `jupyter_notebook` and `jupyter_widgets` instead.")
  
  from IPython.utils.shimmodule import ShimModule
  
  sys.modules['IPython.html'] = ShimModule(
      src='IPython.html', mirror='jupyter_notebook')
  sys.modules['IPython.html.widgets'] = ShimModule(
      src='IPython.html.widgets', mirror='jupyter_widgets')
  
  if __name__ == '__main__':
      from jupyter_notebook import notebookapp as app
      app.launch_new_instance()
  
subject: Add shim to new widgets repository.