worth enhancing "man git-rebase" to show non-HEAD examples?

  one of the things i've noticed about the examples in "man
git-rebase" is that they invariably show rebasing relative to a
branch point that has not moved. for example, there's this example:

       o---o---o---o---o  master
            \
             o---o---o---o---o  next
                              \
                               o---o---o  topic

with subsequent sample command:

  $ git rebase --onto master next topic

sure, that works, but there seem to be no examples that show that this is a valid starting point as well:

       o---o---o---o---o  master
            \
             o---o---o---o---o  next
                      \
                       o---o---o  topic

as in, the examples in that man page could potentially suggest to an inexperienced reader that the *only* valid situations are rebasing as long as the other branch has not developed any further. (yes, i realize that, if you read carefully, it *should* make it clear, but i think it would be helpful to at least graphically show that happening.)

  thoughts?

rday