human
Solve the following python programming problem given the following code:
def test_dot() : 
    def fun(x, y) : 
        return to_scalar (np.dot (x, y)) 
def dfun(x, y) : 
        return to_scalar (grad (fun) (x, y)) 
mat1 = npr.randn (10, 11) 
    mat2 = npr.randn (10, 11) 
    vect1 = npr.randn (10) 
    vect2 = npr.randn (11) 
    vect3 = npr.randn (11) 
    check_grads (fun, mat1, vect2) 
    check_grads (fun, mat1, mat2.T) 
    check_grads (fun, vect1, mat1) 
    check_grads (fun, vect3, vect3) 
    check_grads (dfun, mat1, vect2) 
    check_grads (dfun, mat1, mat2.T) 
    check_grads (dfun, vect1, mat1) 
    check_grads (dfun, vect2, vect3) 

    
    

    Fix the buggy line: check_grads (fun, vect3, vect3)
assistant
#Here is Python code to fix the buggy line: check_grads (fun, vect3, vect3)
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check_grads (fun, vect2, vect3)