old_contents: # -*- coding: utf-8 -*-
  
  from sunpy.map import GenericMap
  
  __all__ = ['IRISMap']
  
  class IRISMap(GenericMap):
      """AIA Image Map definition
      
      References
      ----------
      For a description of AIA headers
      http://jsoc.stanford.edu/doc/keywords/AIA/AIA02840_A_AIA-SDO_FITS_Keyword_Documents.pdf
      """
      
      def __init__(self, data, header, **kwargs):
          
          GenericMap.__init__(self, data, header, **kwargs)
      
      @classmethod
      def is_datasource_for(cls, data, header, **kwargs):
          """Determines if header corresponds to an AIA image"""
          tele = header.get('TELESCOP', '').startswith('IRIS')
          obs = header.get('INSTRUME', '').startswith('SJI')
          return tele and obs
new_contents: # -*- coding: utf-8 -*-
  
  from sunpy.map import GenericMap
  
  __all__ = ['IRISMap']
  
  class IRISMap(GenericMap):
      """
      A 2D IRIS Map
      """
      
      def __init__(self, data, header, **kwargs):
          
          GenericMap.__init__(self, data, header, **kwargs)
      
      @classmethod
      def is_datasource_for(cls, data, header, **kwargs):
          """Determines if header corresponds to an AIA image"""
          tele = header.get('TELESCOP', '').startswith('IRIS')
          obs = header.get('INSTRUME', '').startswith('SJI')
          return tele and obs
  
subject: Change class doc string!