old_contents: 
  try:
      from astropy.tests.plugins.display import (pytest_report_header,
                                                 PYTEST_HEADER_MODULES,
                                                 TESTED_VERSIONS)
  except ImportError:
      # When using astropy 2.0
      from astropy.tests.pytest_plugins import (pytest_report_header,
                                                PYTEST_HEADER_MODUULES,
                                                TESTED_VERSIONS)
  
  try:
      PYTEST_HEADER_MODULES['Cython'] = 'Cython'
      PYTEST_HEADER_MODULES['Astropy'] = 'astropy'
      PYTEST_HEADER_MODULES['scikit-learn'] = 'sklearn'
      # pymc import here triggers pytest INTERNALERROR thus as a temporary
      # measure we don't list its version number
      #    PYTEST_HEADER_MODULES['pymc'] = 'pymc'
      PYTEST_HEADER_MODULES['astroML_addons'] = 'astroML_addons'
      del PYTEST_HEADER_MODULES['h5py']
      del PYTEST_HEADER_MODULES['Pandas']
  except (KeyError):
      pass
  
  
  # This is to figure out the package version, rather than
  # using Astropy's
  
  from . import __version__ as version
  
  TESTED_VERSIONS['astroMl'] = version
  
new_contents: 
  try:
      from astropy.tests.plugins.display import (pytest_report_header,
                                                 PYTEST_HEADER_MODULES,
                                                 TESTED_VERSIONS)
  except ImportError:
      # When using astropy 2.0
      from astropy.tests.pytest_plugins import (pytest_report_header,
                                                PYTEST_HEADER_MODULES,
                                                TESTED_VERSIONS)
  
  try:
      PYTEST_HEADER_MODULES['Cython'] = 'Cython'
      PYTEST_HEADER_MODULES['Astropy'] = 'astropy'
      PYTEST_HEADER_MODULES['scikit-learn'] = 'sklearn'
      # pymc import here triggers pytest INTERNALERROR thus as a temporary
      # measure we don't list its version number
      #    PYTEST_HEADER_MODULES['pymc'] = 'pymc'
      PYTEST_HEADER_MODULES['astroML_addons'] = 'astroML_addons'
      del PYTEST_HEADER_MODULES['h5py']
      del PYTEST_HEADER_MODULES['Pandas']
  except (KeyError):
      pass
  
  
  # This is to figure out the package version, rather than
  # using Astropy's
  
  from . import __version__ as version
  
  TESTED_VERSIONS['astroMl'] = version
  
subject: Fix typo