sample commit-msg hook: no silent exit on duplicate Signed-off-by lines
git-commit would silently exit if duplicate Signed-off-by lines were found. Users of git-commit would not know it, unless they checked '$?'. This patch makes git-commit actually print out a message that nothing was commited since duplicate Signed-off-lines were found.
Signed-off-by: Luben Tuikov <firstname.lastname@example.org> Signed-off-by: Junio C Hamano <email@example.com>