* call this to die(), when it is suspected that the user mistyped a
* ref to the command, to give suggested "correct" refs.
*/
-void help_unknown_ref(const char *ref, const char *cmd, const char *error);
+NORETURN void help_unknown_ref(const char *ref, const char *cmd, const char *error);
static inline void list_config_item(struct string_list *list,
const char *prefix,