rework tertiary display API again

src/bin/main.rs

@@ -94,7 +94,7 @@ async fn main(spawner: Spawner) {
     let h = EXAMPLE[HEART];
     let e = EXAMPLE[EMPTY];
     let b = EXAMPLE[BOX];
-    if let Err(e) = lcd.write(&alloc::format!("Custom symbols: {h}{e}{b}")) {
+    if let Err(e) = lcd.write(&alloc::format!("Custom symbols: {h}{e}{b} And more stuff to wrap and cut off please.")) {
         log::error!(
             "Tertiary LCD startup text write failed over shared I2C bus; check the shared bus, wiring, and device responses: {e}"
         );