Info tip/Hide section/Evaluator - How to add line breaks?

A hide section in an info tip using the evaluator works well, if everything is written in one line:

{!=ext=="jpeg"=}width: {picwidth} height: {picheight}{!}

But how do I enter line breaks? This will not work:

{!=ext=="jpeg"=}
width: {picwidth}
height: {picheight}
{!}

The condition is ignored and {!} will be visible.