Use RSpec 2.99
Use a custom null object in the silence output context
Convert specs to RSpec 2.99.0.beta1 syntax with Transpec

This conversion is done by Transpec 1.7.0 with the following command:
    transpec

* 7 conversions
    from: be_true
      to: be_truthy

* 7 conversions
    from: be_false
      to: be_falsey

* 3 conversions
    from: expect_any_instance_of(Klass).to receive(:message) { |arg| }
      to: expect_any_instance_of(Klass).to receive(:message) { |instance, arg| }
Use RSpec 3.0
Remove useless RSpec configurations
Enforce expect syntax with rspec-mocks
Merge branch 'upgrade-to-rspec-3'