Nofxx subtitle_it

Convert specs to RSpec 3.2.3 syntax with Transpec

This conversion is done by Transpec 3.1.0 with the following command:
transpec spec -f

• 73 conversions from: obj.should to: expect(obj).to

• 43 conversions from: obj.should_receive(:message) to: expect(obj).to receive(:message)

• 6 conversions from: == expected to: eq(expected)

• 3 conversions from: lambda { }.should to: expect { }.to

• 2 conversions from: obj.should_not to: expect(obj).not_to

• 1 conversion from: lambda { }.should_not to: expect { }.not_to

For more details: https://github.com/yujinakayama/transpec#supported-conversions
https://github.com/nofxx/subtitle_it/commit/754357657947d58d7832b46...