Sometimes the author needs to be corrected, but the rest of the change is completely valid. Support fixing the author by amending the commit with `git commit --author` and uploading a replacement patch set where only the author differs from the prior version. Bug: issue 695 Change-Id: I4886d852a61f6f55257985a4f011d65a244d00e1 Signed-off-by: Shawn O. Pearce <sop@google.com>