          The maximum legal length [Optional]
  
      type or tuple _allowed:
          A type or tuple of allowed item types [Optional]
  
      class _IndexError:
          The type of exception to be raise on invalid index [Optional]
      """
  
      _minlength = 0
      _maxlength = None
      _IndexError = IndexError
 
</s> remove     _IndexError = IndexError
 </s> add  </s> remove 

class GEOSIndexError(GEOSException, KeyError):
    """
    This exception is raised when an invalid index is encountered, and has
    the 'silent_variable_feature' attribute set to true.  This ensures that
    django's templates proceed to use the next lookup type gracefully when
    an Exception is raised.  Fixes ticket #4740.
    """
    # "If, during the method lookup, a method raises an exception, the exception
    #  will be propagated, unless the exception has an attribute
    #  `silent_variable_failure` whose value is True." -- Django template docs.
    silent_variable_failure = True
 </s> add  </s> remove     # Raise GEOSIndexError instead of plain IndexError
    # (see ticket #4740 and GEOSIndexError docstring)
    _IndexError = GEOSIndexError
 </s> add  </s> remove         raise self._IndexError('invalid index: %s' % str(index))
 </s> add         raise IndexError('invalid index: %s' % str(index)) </s> remove             raise GEOSIndexError('invalid GEOS Geometry index: %s' % str(index))
 </s> add             raise IndexError('invalid GEOS Geometry index: %s' % str(index))
          The maximum legal length [Optional]
  
      type or tuple _allowed:
          A type or tuple of allowed item types [Optional]



      """
  
      _minlength = 0
      _maxlength = None
      _IndexError = IndexError
keep keep keep keep replace replace replace keep keep keep keep keep
 Fixed #25225 -- Simplified code to remove GEOSIndexError

The test is a regression for refs #4740 to show that the original
fix of GEOSIndexError is no longer needed. 
django/contrib/gis/geos/mutable_list.py