See http://test.musicbrainz.org/edit/13876399

Now it says, for (one) recording:

Old recording: X
New recording: Y

And for (one) work (note the plural too):

Old works: X
New work: Y

That makes it sound as if a new recording / work had been created for the merge, and is awkward. Could we please go back to our nicer sounding old ways?
Merge: X
Into: Y