// Berserking monsters don't flee.
        if (mon->has_ench(ENCH_BERSERK))

    {
        const bool flee_sanct = !mons_wont_attack(mon) 
                                && is_sanctuary(mon->x, mon->y);
        // Berserking monsters don't flee, unless it's from sanctuary.
        if (mon->has_ench(ENCH_BERSERK) && !flee_sanct)

        // Neither do plants or nonliving beings.

        // Neither do plants or nonliving beings, and sanctuary doesn't
        // affect plants.

            || mons_class_holiness(mon->type) == MH_NONLIVING)

            || (mons_class_holiness(mon->type) == MH_NONLIVING && !flee_sanct))

            mon->del_ench(ENCH_FEAR, true, true);

    }