Help with merging from dev branch to one or more child branches then Trunk

[Barry]

All,

I would appreciate for any ideas on this issue that i have.

If I have branched A, B and DEV. Branch A, B and Branch DEV. A change is
checked into DEV branch which is not yet ready for the Trunk. The change
involves 10 files.

What are the best practice to apply this change over 10 files to Branch A
and Main Trunk? How can I achieve this? The change should be numbered and
that 10 checkins should be commented related to one bug? How can I apply
that change from Branch DEV to Branch A, B and more, then to the Trunk?

Thanks

Baz