[PATCH v5 0/4] Add git-merge --cleanup support

Merry Christmas, everyone!

I've finally had some free time to throw together the changes I promised a couple weeks ago, so now git-merge will support --cleanup just like git-commit.

Not related to this but while I was making my changes, I noticed that -F and -m don't die properly in git-merge when they accept invalid arguments. Instead, they just print an error message to stderr and the program keeps running. Is this the expected behaviour?

Changes since V1:
	* Only check MERGE_MSG for a scissors line instead of all prepended
	  files
	* Make a variable static in merge where appropriate
	* Add passthrough options in pull
	* Add documentation for the new option
	* Add tests to ensure desired behaviour

Changes since V2:
	* Merge both patches into one patch
	* Fix bug in help message printing logic

Changes since V3:
	* Add patch to cleanup 'merge --squash c3 with c7' test in t7600
	* Use test_i18ncmp instead of test_cmp to pass GETTEXT_POISON tests

Changes since V4:
	* Add patches so that git-merge messages will be cleaned up like in
      git-commit

Denton Liu (4):
  commit: extract cleanup_mode functions to sequencer
  t7600: clean up 'merge --squash c3 with c7' test
  merge: cleanup messages like commit
  merge: add scissors line on merge conflict

 Documentation/merge-options.txt |  7 ++++
 builtin/commit.c                | 41 +++++++++-------------
 builtin/merge.c                 | 45 ++++++++++++++++++++----
 builtin/pull.c                  |  6 ++++
 sequencer.c                     | 29 ++++++++++++++++
 sequencer.h                     |  4 +++
 t/t7600-merge.sh                | 53 +++++++++++++++++++++++++---
 t/t7604-merge-custom-message.sh | 61 +++++++++++++++++++++++++++++++++
 wt-status.c                     | 12 +++++--
 wt-status.h                     |  1 +
 10 files changed, 221 insertions(+), 38 deletions(-)