human
Solve the following python programming problem given the following code:
def _divide(self, estimate) : 
    class_name = self.__class__.__name__ 
    doc_string = ('
            Divide the %s of two %s objects.

            Parameters:
              other: an %s fitted instance.

            ' % (class_name, class_name, class_name)) 
    def divide(other) : 
        self_estimate = getattr (self, estimate) 
        other_estimate = getattr (other, estimate) 
        new_index = np.concatenate ((other_estimate.index, self_estimate.index)) 
        new_index = np.unique (new_index) 
        return (self_estimate.reindex (new_index, method = 'ffill') / other_estimate.reindex (new_index, method = 'ffill')) 
divide.__doc__ = doc_string 
    return divide 

    
    

    Fix the buggy line: doc_string = ('
            Divide the %s of two %s objects.

            Parameters:
              other: an %s fitted instance.

            ' % (class_name, class_name, class_name))
assistant
#Here is Python program to fix the buggy line: doc_string = ('
.

doc_string = ('
            Divide the %s of two %s objects.

            Parameters:
              other: an %s fitted instance.

            ' % (estimate, class_name, class_name))