Leave bend angle blank if 90° on sheet metal flat patterns

I'm having some trouble finding changing my bend notes on flat pattern drawings.  I want the bend angle to be excluded if it is a 90° bend. I've tried writing an iif statement but that didn't work (it just printed the iif statement) and also tried adding a line "= " which it just seemed to ignore.  Any insight would be appreciated, thanks!

SolidworksSheet Metal