Re: [GSoC][PATCH v3 0/4] Add refs exists subcommand

> This series introduces `git refs exists` as a modern replacement for
> `git show-ref --exists`, continuing the effort to consolidate commands
> under the `git refs` namespace.
>
> changes in v3:
>  - Reverted commit message.
>  - nit: added empty line.
>
> Meet Soni (4):
>   builtin/refs: add 'exists' subcommand
>   t1403: split 'show-ref --exists' tests into a separate file
>   t1422: refactor tests to be shareable
>   t: add test for git refs exists subcommand
>
>  Documentation/git-refs.adoc |  7 ++++
>  builtin/refs.c              | 48 +++++++++++++++++++++++
>  t/meson.build               |  4 +-
>  t/show-ref-exists-tests.sh  | 77 +++++++++++++++++++++++++++++++++++++
>  t/t1403-show-ref.sh         | 65 -------------------------------
>  t/t1422-show-ref-exists.sh  |  9 +++++
>  t/t1462-refs-exists.sh      | 10 +++++
>  7 files changed, 154 insertions(+), 66 deletions(-)
>  create mode 100644 t/show-ref-exists-tests.sh
>  create mode 100755 t/t1422-show-ref-exists.sh
>  create mode 100755 t/t1462-refs-exists.sh
>
> Range-diff against v2:
>  1:  19623eb97e <  -:  ---------- doc: factor out common option
>  2:  69c207dc45 <  -:  ---------- builtin/for-each-ref: align usage string with the man page
>  3:  6eeb1c070a <  -:  ---------- builtin/for-each-ref: factor out core logic into a helper
>  4:  eecccfe98b <  -:  ---------- builtin/refs: add list subcommand
>  5:  aa91c5c570 <  -:  ---------- t6300: refactor tests to be shareable
>  6:  fed66d91c0 <  -:  ---------- t: add test for git refs list subcommand
>  7:  b55e6d36eb <  -:  ---------- diff: ensure consistent diff behavior with ignore options
>  8:  e1d3d61a45 <  -:  ---------- diff: --no-index should ignore the worktree
>  9:  621ce9c1c6 <  -:  ---------- git-jump: make `diff` work with filenames containing spaces
> 10:  9a49aef8dc <  -:  ---------- environment: remove the global variable 'merge_log_config'
> 11:  22d421fed9 <  -:  ---------- builtin/fmt-merge-msg: stop depending on 'the_repository'
> 12:  741f36c7d9 <  -:  ---------- docs: remove stray bracket from git-clone synopsis
> 13:  1fa68948c3 <  -:  ---------- The second batch