The contact menus offered "Duplicate", which made more copies. They now
offer "Merge with…", the selection bar has "Merge…" for two or more
contacts, and a "Possible duplicates (n)" line over the list opens a view
that groups cards with the same name, email address or phone. The test
that expected "Duplicate" in both menus now expects "Merge with…", and
the test for a failed duplicate became tests for merging.