CQL Runner doesn't display empty string results

[duncand]

Run the following CQL in the CQL Runner:

define x: 'hello'
define y: ''
define z: null

As you can see, the non-erroneous empty string result is not output:

>> x [1:1] hello
>> z [3:1] Null

While it might appear blank due to how string values are currently output without quotes, one would still expect to see the ">> y [2:1]" line.

[duncand]

I have also noticed in the past that CQL Runner sometimes doesn't display a subset of the define outputs at all, they just aren't mentioned. I suspect this specific issue might be the reason, or otherwise it is an example of several cases that aren't being displayed but should be.