Convert specs to RSpec 3.0.1 syntax with Transpec

This conversion is done by Transpec 2.3.1 with the following command:
    transpec

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

* 28 conversions
    from: its([:key]) { }
      to: describe '[:key]' do subject { super()[:key] }; it { } end

* 26 conversions
    from: obj.should_receive(:message)
      to: expect(obj).to receive(:message)

* 16 conversions
    from: its(:attr) { }
      to: describe '#attr' do subject { super().attr }; it { } end

* 8 conversions
    from: obj.stub(:message => value)
      to: allow(obj).to receive_messages(:message => value)

* 6 conversions
    from: it { should_not ... }
      to: it { is_expected.not_to ... }

* 5 conversions
    from: Klass.any_instance.should_receive(:message)
      to: expect_any_instance_of(Klass).to receive(:message)

* 5 conversions
    from: Klass.any_instance.stub(:message)
      to: allow_any_instance_of(Klass).to receive(:message)

* 3 conversions
    from: Klass.any_instance.stub(:message => value)
      to: allow_any_instance_of(Klass).to receive_messages(:message => value)

* 3 conversions
    from: obj.should_not_receive(:message)
      to: expect(obj).not_to receive(:message)

* 2 conversions
    from: obj.stub(:message)
      to: allow(obj).to receive(:message)

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