@it("creates isolated contexts for each Example when run")
        def s(w):
            w.eg.run(MockReporter())

            assert len(w.worlds) == 2
            assert w.worlds[0] <= w.worlds[1]
dataset/ETHPy150Open fidothe/rgf/spec/rgf/core/examples/example_group_spec.py/s/operator `is not` -> `<=`