Function arith_sub

xrepo/packages/l/lua/port/lua/src/lstrlib.c:301–303

}

static int arith_sub (lua_State *L) {
  return arith(L, LUA_OPSUB, "__sub");
}

static int arith_mul (lua_State *L) {
  return arith(L, LUA_OPMUL, "__mul");