Would you mind also updating the post-review docs in the Review Board source tree with the new parameter?
postreview.py: add separator between commits
Review Request #1465 — Created March 8, 2010 and discarded
postreview.py: add separator between commits When posting a git / git-svn review with --guess-description, add a separator between commit logs. The separator is a 72-character line of a user-specified character. The default is empty.
posting this review request :-) (with no separator; also tested specifying separator with a git-svn repo, trying both single-commit and multiple-commit requests)