Reduce json stringify

[Uzlopak]

We can reduce the amount of JSON.stringify calls for the obvious cases. ;)

[G-Rath]

I don't think this is a good change - we're using JSON.stringify exactly what it's meant for: so we don't have to manually craft JSON or worry about escaping etc; while yes these cases might be safer to write out directly, it means going forward we should be making people decide "is this JSON simple enough to not use JSON.stringify?".

It's also possible refractors could result in dynamic content that needs to be escaped gets introduced, which JSON.stringify would handle for us - better to just always use JSON.stringify and not have to think about it

[gr2m]

I agree with @G-Rath. I don't think the optimization is worth it for code readability / maintainability reasons. JSON.stringify is very efficient in modern runtimes.