TestAttributedStringMerge.m: add a disabled test for another currently unsupported case
TestAttributedStringMerge.m: add a disabled test for another currently unsupported case

etoile/CoreObject,etoile/CoreObject,chris-armstrong/CoreObject,chris-armstrong/CoreObject,chris-armstrong/CoreObject,etoile/CoreObject,etoile/CoreObject,chris-armstrong/CoreObject