human
Solve the following python programming problem given the following code:
def _run_solout_test(self, integrator) : 
    ts = [] 
    ys = [] 
    t0 = 0.0 
    tend = 10.0 
    y0 = [1.0, 2.0] 
    def solout(t, y) : 
        ts.append (t) 
        ys.append (y.copy ()) 
def rhs(t, y) : 
        return [(y [0] + y [1]), (- (y [1] ** 2))] 
ig = ode (rhs).set_integrator (integrator) 
    ig.set_solout (solout) 
    ig.set_initial_value (y0, t0) 
    ret = ig.integrate (tend) 
    assert_array_equal (ys [0], y0) 
    assert_array_equal (ys [(- 1)], ret) 
    assert_equal (ts [0], t0) 
    assert_equal (y0 [(- 1)], tend) 

    
    

    Fix the buggy line: assert_equal (y0 [(- 1)], tend)
assistant
#Here is Python program to fix the buggy line: assert_equal (y0 [(- 1)], tend)
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assert_equal (ts [(- 1)], tend)