Merge 'js/add-i-delete' into maint-2.37

Rewrite of "git add -i" in C that appeared in Git 2.25 didn't
correctly record a removed file to the index, which is an old
regression but has become widely known because the C version
has become the default in the latest release.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --cc add-interactive.c
Simple merge

diff --cc t/t3701-add-interactive.sh
Simple merge