human
Solve the following python programming problem given the following code:
@ requires_IEEE_754 
@ unittest.skipIf (HAVE_DOUBLE_ROUNDING, 'fsum is not exact on machines with double rounding') 
def testFsum(self) : 
    from sys import float_info 
    mant_dig = float_info.mant_dig 
    etiny = (float_info.min_exp - mant_dig) 
    def msum(iterable) : 
        "Full precision summation.  Compute sum(iterable) without any
            intermediate accumulation of error.  Based on the 'lsum' function
            at http://code.activestate.com/recipes/393090/

            " 
        (tmant, texp) = (0, 0) 
        for x in iterable : 
            (mant, exp) = math.frexp (x) 
            (mant, exp) = (int (math.ldexp (mant, mant_dig)), (exp - mant_dig)) 
            if (texp > exp) : 
                tmant <<= (texp - exp) 
                texp = exp 
else : 
                mant <<= (exp - texp) 
tmant += mant 
tail = max (((len (bin (abs (tmant))) - 2) - mant_dig), (etiny - texp)) 
        if (tail > 0) : 
            h = (1 << (tail - 1)) 
            tmant = ((tmant // (2 * h)) + bool (((tmant & h) and (tmant & ((3 * h) - 1))))) 
            texp += tail 
return math.ldexp (tmant, texp) 
test_values = [([], 0.0), ([0.0], 0.0), ([1e+100, 1.0, (- 1e+100), 1e-100, 1e+50, (- 1.0), (- 1e+50)], 1e-100), ([(2.0 ** 53), (- 0.5), (- (2.0 ** (- 54)))], ((2.0 ** 53) - 1.0)), ([(2.0 ** 53), 1.0, (2.0 ** (- 100))], ((2.0 ** 53) + 2.0)), ([((2.0 ** 53) + 10.0), 1.0, (2.0 ** (- 100))], ((2.0 ** 53) + 12.0)), ([((2.0 ** 53) - 4.0), 0.5, (2.0 ** (- 54))], ((2.0 ** 53) - 3.0)), ([(1.0 / n) for n in range (1, 1001)], float.fromhex ('0x1.df11f45f4e61ap+2')), ([(((- 1.0) ** n) / n) for n in range (1, 1001)], float.fromhex ('-0x1.62a2af1bd3624p-1')), (([((1.7 ** (i + 1)) - (1.7 ** i)) for i in range (1000)] + [(- (1.7 ** 1000))]), (- 1.0)), ([1e+16, 1.0, 1e-16], 1.0000000000000002e+16), ([(1e+16 - 2.0), (1.0 - (2.0 ** (- 53))), (- (1e+16 - 2.0)), (- (1.0 - (2.0 ** (- 53))))], 0.0), (([(((2.0 ** n) - (2.0 ** (n + 50))) + (2.0 ** (n + 52))) for n in range ((- 1074), 972, 2)] + [(- (2.0 ** 1022))]),...

    
    

    Fix the buggy line: self.assertEqual (mant_dig, expected)
assistant
#Here is Python program to fix the buggy line: self.

self.assertEqual (actual, expected)