Updating to RSpec 3
Convert specs to RSpec 3.1.7 syntax with Transpec

This conversion is done by Transpec 3.0.3 with the following command:
    transpec

* 3 conversions
    from: obj.should
      to: expect(obj).to

* 2 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

For more details: https://github.com/yujinakayama/transpec#supported-conversions