[PATCHv4 0/5] Teach shell scripts to be quiet

The main goal of this series is to teach git-am and git-rebase to be quiet.

This series feels very improved. I'm pretty confident in the first three patches. I've split off the suppressing errors from git-apply in git-am into its own patch this time around. It felt more like an independent change.

I've tried to make sure I maintained GIT_QUIET after failing to apply, but I'd appreciate if others could look over that to make sure.

Changes since v3:
    - simplify say()
    - say "applying to an empty history" in am.sh
    - quiet merge in rebase.sh::call_merge()
    - drop >&2 in a couple places in rebase.sh
    - maintain GIT_QUIET when git-am or git-rebase fails
    - fixup style issues with repack.sh
    - add to git_am_opt instead of hijacking GIT_QUIET in rebase.sh

Changes since v2:
    - say uses printf instead of echo
    - suppressing errors from git-apply under am -3 -q
    - added a test for am -3 -q
    - added a test for am where subjects have a literal newline
    - am,rebase tests check both stdout and stderr
    - rebase.sh::continue_merge() suppress the output of git rev-list

Changes since v1:
    - introduction of say()
    - migration of submodule and repack

Stephen Boyd (5):
  t4150: test applying with a newline in subject
  am: suppress apply errors when using 3-way
  git-sh-setup: introduce say() for quiet options
  submodule, repack: migrate to git-sh-setup's say()
  am, rebase: teach quiet option

 Documentation/git-am.txt     |    6 ++++-
 Documentation/git-rebase.txt |    4 +++
 git-am.sh                    |   35 +++++++++++++++++++++++-------
 git-rebase.sh                |   48 +++++++++++++++++++++++++++++++++--------
 git-repack.sh                |   12 ++++------
 git-sh-setup.sh              |    9 +++++++
 git-submodule.sh             |   24 +++++---------------
 t/t3400-rebase.sh            |   19 +++++++++++-----
 t/t4150-am.sh                |   26 ++++++++++++++++++++++
 9 files changed, 133 insertions(+), 50 deletions(-)