Bisect: refactor some logging into "bisect_write". Also use "die" instead of "echo >&2 something ; exit 1". And simplify "bisect_replay". Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>