Fix committer name ?

[Stephen J. Turnbull]

Stephen J. Turnbull writes:

 > [Andrew's description of rebase] is correct, except that the
 > content [of the original and rebased branches] is *identical*.

Note that this is true *only* in a case like Xavier's where no
re*base*ing is actually done, and only metadata changes.  His rebased
branch and his original branch have identical content, including the
base (branch point or root).

So I think we can be quite confident that Xavier probably won't run
into the usual set of rebase problems if he decides to go the "rebase
and fixup metadata" route.