are using a browser extension to selectively enable or disable
Describe your changes (optional):
Review Request #755
Created March 2, 2009 and submitted
Added guess-summary and guess-description options for git
Works for posting this review.
Modified the help text to mention how the messages are computed, and that they're Git-only (we can change that down the road when we add this for more SCMs).
Committed as r1812.