#1111 Duplicate finder complains about similar variants

[Darrah Chavey]

The Duplicate Finder generally recognizes that title A is a variant of title P, and so it doesn't complain about that pairing being a "duplicate". But if title A and title B are both variants of P, and A and B are similar to each other, then the pair (A,B) will keep showing up in the Duplicate Finder "Similar Title Mode", even though they've clearly been processed before. It would be better for them not to be included in the report. An example is Cathy Buburuz, with the three variant titles P="Cash-and-Carry Me" (parent title); A="Cash and Carry Me", and B="Cash-and-Carry-Me".