[PATCH v4 0/4] introduce new option `--auto-advance`

Hello,

After after more reviews and deliberations, I have been able to rename the new option name to `--auto-advance`, where the --no-auto-advance implements the feature and does not auto advance while --auto-advance is the default and maintains the current behaviour.

With the option, users can navigate in between files while deciding on hunks as they wish with the '>' and '<' option for going to the next and previous file respectively if there are more than one file.

Patch 1 implements the new `--no-auto-advance` options, Patch 2 modifies the function `patch_update_file()` to instead take the index of the file as parameter instead of the file_diff. Patch 3 moves the 'git apply' logic into a function so that we can reuse this logic when implementing the all or none application of patches. Patch 4 implements the interfile navigation, and adds tests to the interactive test file.

Changes in v4:
==============
- Renamed option to `--no-auto-advance` with `auto-advance` being
  the default option
- Modified the function signature of 'patch_update_file()' to accept
  the index of the file diff
- Moved git apply logic into function for reuse
- Removed the whatnow prompt. Now the hunks in the file keep
  showing even after all hunks have been decided
- Added hunk summary to patch help remainder to show the user the
  hunk deails
- Added tests ot t3701-add-interactive.sh

Abraham Samuel Adekunle (4):
  interactive -p: add new `--auto-advance` flag
  add-patch: modify patch_update_file() signature
  add-patch: allow all-or-none application of patches
  add-patch: allow interfile navigation when selecting hunks

 add-interactive.c          |   4 +
 add-interactive.h          |   5 +-
 add-patch.c                | 157 +++++++++++++++++++++++++++----------
 builtin/add.c              |   4 +
 builtin/checkout.c         |   7 ++
 builtin/reset.c            |   4 +
 builtin/stash.c            |   8 ++
 t/t3701-add-interactive.sh | 100 +++++++++++++++++++++++
 t/t9902-completion.sh      |   1 +
 9 files changed, 246 insertions(+), 44 deletions(-)