* lisp/vc/vc-hg.el (vc-hg-checkin-patch): Add Hg-specific implementation (bug#52349), like suggested in https://lists.gnu.org/archive/html/emacs-devel/2022-10/msg01533.html. (vc-hg--extract-headers): Extract from vc-hg-checkin.
* lisp/vc/vc-hg.el (vc-hg-checkin-patch): Add Hg-specific implementation (bug#52349), like suggested in https://lists.gnu.org/archive/html/emacs-devel/2022-10/msg01533.html. (vc-hg--extract-headers): Extract from vc-hg-checkin.