Suppose that we edit the document in XML (we are already
doing this part of the time), do a final nroffing pass to get the
format just right, and then give the author(s) the edited xml,
final .txt, and a diff file. (We could easily do this today).
The author(s) change the .xml (or give us a patch file for us
to make the changes.) We have to make a new nroff version and
PUT THE SAME CHANGES INTO IT THAT WE DID THE FIRST TIME.
This sound like quite a good approach.
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