660045fb53
In emacs mode, force ^R to backware search the history This behaviour is the default in emacs mode for most of the other shells Note: Note that this can still be overridden via $EDITRC, ~/.editrc or a bind command after set -o emacs. MFC after: 1 week Approved by: jilles Reviewed by: jilles, arichardson, pstef Differential Revision: https://reviews.freebsd.org/D29494