Test for new print statements

[TorkelE]

So, this happens every once in a while. Someone makes a new features or fixed a bug. To fix it some print, println, infilitration, or similar statement is added. Somehow it is forgotten to be removed and not caught in reviews.

like obviously this could be sorted by reviewing properly, and it happens rarely. Still, it wouldn't hurt to have an automatic check.

I realise this might not be at all within the framework of aqua. But maybe it could be an interesting feature to have the option for a check which gives some form of warning when something like this is added (because every once in a while it is intentional, but probably far rarer).