I stare at the commit message: Reverted Jane's changes. Done by Mark, timestamped from the evening before. Mark has done some things that drive me crazy, but this takes the cake. I see him across the office, standing around laughing with some people, so I leave my desk and interrupt the conversation, “Hey Mark, could I talk to you for a sec?” He responds with an offhand, “Sure.” I try to rein in my anger as I lead the way...