old_contents: 
  # GH9602
  # deprecate rpy to instead directly use rpy2
  
  import warnings
  warnings.warn("The pandas.rpy module is deprecated and will be "
                "removed in a future version. We refer to external packages "
                "like rpy2, found here: http://rpy.sourceforge.net", FutureWarning)
  
  try:
      from .common import importr, r, load_data
  except ImportError:
      pass
  
new_contents: 
  # GH9602
  # deprecate rpy to instead directly use rpy2
  
  import warnings
  warnings.warn("The pandas.rpy module is deprecated and will be "
                "removed in a future version. We refer to external packages "
                "like rpy2. "
                "\nSee here for a guide on how to port your code to rpy2: "
                "http://pandas.pydata.org/pandas-docs/stable/r_interface.html",
                FutureWarning)
  
  try:
      from .common import importr, r, load_data
  except ImportError:
      pass
  
subject: add link to docs in deprecation warning