[PATCH v2 0/4] Finish converting git bisect to C part 4

These patches correspond to a fourth part of patch series of Outreachy project "Finish converting `git bisect` from shell to C" started by Pranit Bauva and Tanushree Tumane (https://public-inbox.org/git/pull.117.git.gitgitgadget@gmail.com) and continued by me.

This fourth part is formed by reimplementations of some `git bisect` subcommands and removal of some temporary subcommands.

These patch series emails were generated from: https://gitlab.com/mirucam/git/commits/git-bisect-work-part4-v2.

General changes
---------------
* Rebase on master branch: 2e36527f23 (The sixth batch, 2021-04-02).
* Change argv_array structs to strvec.

Specific changes ----------------

[2/4] bisect--helper: reimplement `bisect_visualize()`shell function in C
* Add `|| exit` to bisect_visualize call in shell script.
---

[3/4] bisect--helper: reimplement `bisect_run` shell function in C
* Add `|| exit` to bisect_run call in shell script.
---

Miriam Rubio (1):
  bisect--helper: retire `--bisect-next-check` subcommand

Pranit Bauva (2):
  run-command: make `exists_in_PATH()` non-static
  bisect--helper: reimplement `bisect_visualize()`shell function in C

Tanushree Tumane (1):
  bisect--helper: reimplement `bisect_run` shell function in C

 builtin/bisect--helper.c | 124 ++++++++++++++++++++++++++++++++++++---
 git-bisect.sh            |  87 +--------------------------
 run-command.c            |   2 +-
 run-command.h            |  10 ++++
 4 files changed, 129 insertions(+), 94 deletions(-)