human
Solve the following python programming problem given the following code:
def _preprocessorTest(self, docFactory) : 
    def preprocessor(uncompiled) : 
        self.assertEquals (len (uncompiled), 1) 
        uncompiled = uncompiled [0] 
        self.assertEquals (uncompiled.tagName, 'div') 
        self.assertEquals (len (uncompiled.children), 2) 
        self.assertEquals (uncompiled.children [0].tagName, 'span') 
        self.assertEquals (uncompiled.children [0].children, ['Hello']) 
        self.assertEquals (uncompiled.children [1].tagName, 'span') 
        self.assertEquals (uncompiled.children [1].children, ['world']) 
        return t.div ['goodbye.'] 
doc = docFactory.load (preprocessors = [preprocessor]) 
    self.assertEquals (preprocessor, ['<div>goodbye.</div>']) 

    
    

    Fix the buggy line: self.assertEquals (preprocessor, ['<div>goodbye.</div>'])
assistant
#Here is Python program to fix the buggy line: self.

self.assertEquals (doc, ['<div>goodbye.</div>'])