Introjucer bug on tooltips

I'm using Introjucer to setup tooltip content of my UI components.
I cannnot succeed in adding Line return to the tooltip, each \n added in the tooltip via Introjucer is converted to \\n, then resulting in a \n displayed in the tooltip window, rather than jumping to a new line.
I think it is a Introjucer bug.

Well, it's not a bug, because the text in that field is not supposed to be a C-formatted string! 

The real issue you're having is just because the tooltip entry box wasn't multi-line - I've tweaked that now so it should work.

Thank you so much Jules !