[PATCH] shortlog wrap usage

Hi all,

Found this hidden "-w" option to the shortlog command, and thought it  
might be good to have it documented.

  builtin-shortlog.c  |    2 +-
  man1/git-shortlog.1 |    6 +++++-
  2 files changed, 6 insertions(+), 2 deletions(-)

Thanks,
Fredrik