random cleanup
Convert specs to RSpec 3.1.0 syntax with Transpec

This conversion is done by Transpec 2.3.8 with the following command:
    transpec

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

* 24 conversions
    from: == expected
      to: eq(expected)

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

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

* 3 conversions
    from: Klass.any_instance.should_not_receive(:message)
      to: expect_any_instance_of(Klass).not_to receive(:message)

* 1 conversion
    from: Klass.any_instance.stub(:message)
      to: allow_any_instance_of(Klass).to receive(:message)

* 1 conversion
    from: describe 'some feature' { }
      to: describe 'some feature', :type => :feature { }

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