Correct the behavior of multiple 'returns()' calls on expectation

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For example:

def mock = mock()
mock.a().returns(1).returns(2)
play {
    assert 1 == mock.a()
    assert 2 == mock.a()
}

Original issue reported on code.google.com by JohnnyJianHY on 6 Mar 2009 at 12:14

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Original comment by julien.g...@gmail.com on 7 Mar 2009 at 12:48

• Changed state: Accepted

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Original comment by JohnnyJianHY on 8 Mar 2009 at 8:34

• Changed state: Started

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Original comment by JohnnyJianHY on 8 Mar 2009 at 1:24

• Changed state: Fixed