Please consider this scenario.
My trunk has files A.txt, B.txt, C.txt, all the way to... Z.txt.
Branch has files A.txt and C.txt which I modified.
When I merge branch to trunk, the result is modified A.txt, modified C.txt and all the other unmodified files like B.txt, D.txt, etc.
However, I would like to have the trunk only contain the modified A.txt and C.txt.
How can I do that. Please let me know.