[GSoC][PATCH 0/4] rebase: split rebase -p from rebase -i

This splits the `rebase --preserve-merges` functionnality from git-rebase--interactive.sh. This is part of the effort to depreciate preserve-merges. The new script, git-rebase--preserve-merges.sh, should be left to bitrot. All the dead code left by the duplication of git-rebase--interactive.sh is also removed.

This patch series is based of js/sequencer-and-root-commits.

Alban Gruin (4):
  rebase: duplicate git-rebase--interactive.sh to
    git-rebase--preserve-merges.sh
  rebase: strip unused code in git-rebase--preserve-merges.sh
  rebase: use the new git-rebase--preserve-merges.sh
  rebase: remove -p code from git-rebase--interactive.sh

 .gitignore                     |    1 +
 Makefile                       |    2 +
 git-rebase--interactive.sh     |  708 +---------------------------
 git-rebase--preserve-merges.sh | 1004 ++++++++++++++++++++++++++++++++++++++++
 git-rebase.sh                  |   32 +-
 5 files changed, 1040 insertions(+), 707 deletions(-)
 create mode 100644 git-rebase--preserve-merges.sh