Slightly confusing output
I was a bit confused by the test output, since -2 is also a number so I wasn't sure for a moment what was the actual result, -2 or +1.

Maybe instead of just expected and actual we also just need a Diff row?
Not having the untouched actual results also makes it more difficult to copy, paste, manipulate and analyze more complicated data structures.
We now have the --diff-style :none option, so you can turn it off. We could do more tweaking, probably, but I think this is a good solution. What do you think @AndreaCrotti and @hukka?
yeah tbh the problem for me was really only when you have just a number as output, which doesn't happen that often anyway. So feel free to close the issue imho.
If more people encounter this, we can reopen, but I think we're safe to close it.