new_contents: """Functionality with an experimental API. Although you can count on the
  functions in this package being around in the future, the API may change with
  any version update **and will not follow the skimage two-version deprecation
  path**. Therefore, use the functions herein with care, and do not use them in
  production code that will depend on updated skimage versions.
  """
  
subject: Add package docstring for skimage.future