def __init__(self, name, module, docstring, cls=None):
super(Variable, self).__init__(name, module, docstring)<EOL>self.cls = cls<EOL>"""<STR_LIT>"""<EOL>
Same as `pydoc.Doc.__init__`, except `cls` should be provided
as a `pydoc.Class` object when this is a class or instance
variable.