const char *fmt, ...) __attribute__((format(printf, 2, 3)));
void text_screen_set_text(struct text_screen *screen, const char *text);
void text_screen_set_help(struct text_screen *screen, const char *title,
const char *fmt, ...) __attribute__((format(printf, 2, 3)));
void text_screen_set_text(struct text_screen *screen, const char *text);
void text_screen_set_help(struct text_screen *screen, const char *title,