old_contents: # Licensed under a 3-clause BSD style license - see LICENSE.rst
  
  # Packages may add whatever they like to this file, but
  # should keep this content at the top.
  # ----------------------------------------------------------------------------
  from ._base_init import *
  # ----------------------------------------------------------------------------
  
  # Enforce Python version check during package import.
  # This is the same check as the one at the top of setup.py
  import sys
  
  __name__ = "plasmapy"
  
  __doc__ = ("A community-developed and community-driven open source "
             "core Python package for plasma physics.")
  
  
  class UnsupportedPythonError(Exception):
      pass
  
  
  if sys.version_info < tuple((int(val) for val in "3.6".split('.'))):
      raise UnsupportedPythonError("plasmapy does not support Python < {}".format(3.6))
  
  if not _ASTROPY_SETUP_:
      # For egg_info test builds to pass, put package imports here.
      from . import atomic
      from . import classes
      from . import constants
      from . import diagnostics
      from . import mathematics
      from . import physics
      from . import utils
  
  _citation_bibtex = """@misc{plasmapy_community_2018_1238132,
    author       = {PlasmaPy Community and
                    Murphy, Nicholas A. and
                    Leonard, Andrew J. and
                    Sta\'nczak, Dominik and
                    Kozlowski, Pawel M. and
                    Langendorf, Samuel J. and
                    Haggerty, Colby C. and
                    Beckers, Jasper P. and
                    Mumford, Stuart J. and
                    Parashar, Tulasi N. and
                    Huang, Yi-Min},
    title        = {{PlasmaPy: an open source community-developed 
                     Python package for plasma physics}},
    month        = apr,
    year         = 2018,
    doi          = {10.5281/zenodo.1238132},
    url          = {https://doi.org/10.5281/zenodo.1238132}
  }"""
  
new_contents: # Licensed under a 3-clause BSD style license - see LICENSE.rst
  
  # Packages may add whatever they like to this file, but
  # should keep this content at the top.
  # ----------------------------------------------------------------------------
  from ._base_init import *
  # ----------------------------------------------------------------------------
  
  # Enforce Python version check during package import.
  # This is the same check as the one at the top of setup.py
  import sys
  
  __name__ = "plasmapy"
  
  __doc__ = ("A community-developed and community-driven open source "
             "core Python package for plasma physics.")
  
  
  class UnsupportedPythonError(Exception):
      pass
  
  
  if sys.version_info < tuple((int(val) for val in "3.6".split('.'))):
      raise UnsupportedPythonError("plasmapy does not support Python < {}".format(3.6))
  
  if not _ASTROPY_SETUP_:
      # For egg_info test builds to pass, put package imports here.
      from . import atomic
      from . import classes
      from . import constants
      from . import diagnostics
      from . import mathematics
      from . import physics
      from . import utils
  
  __citation__ = """@misc{plasmapy_community_2018_1238132,
    author       = {PlasmaPy Community and
                    Murphy, Nicholas A. and
                    Leonard, Andrew J. and
                    Sta\'nczak, Dominik and
                    Kozlowski, Pawel M. and
                    Langendorf, Samuel J. and
                    Haggerty, Colby C. and
                    Beckers, Jasper P. and
                    Mumford, Stuart J. and
                    Parashar, Tulasi N. and
                    Huang, Yi-Min},
    title        = {{PlasmaPy: an open source community-developed 
                     Python package for plasma physics}},
    month        = apr,
    year         = 2018,
    doi          = {10.5281/zenodo.1238132},
    url          = {https://doi.org/10.5281/zenodo.1238132}
  }"""
  
subject: Rename _citation_bibtex attribute to __citation__