fails:String#% supports binary formats using %b for negative numbers
fails:String#% supports negative integers using %d, giving priority to `-`
fails:String#% supports negative integers using %i, giving priority to `-`
fails:String#% supports octal formats using %o for negative numbers
fails:String#% supports negative bignums with %u or %d
fails:String#% supports hex formats using %x for negative numbers
fails:String#% supports hex formats using %X for negative numbers
