examples: Consistently use unwrap! in favor of .unwrap()

Unfortunately errors from `embedded_graphics` and `core` doesn't provide
the necessary instances currently.

1 files changed, 5 insertions, 5 deletions

diff --git a/examples/stm32f4/src/bin/button.rs b/examples/stm32f4/src/bin/button.rs
index 82c83e80e..90998cf46 100644
--- a/examples/stm32f4/src/bin/button.rs
+++ b/examples/stm32f4/src/bin/button.rs
@@ -28,14 +28,14 @@ fn main() -> ! {
     let mut led3 = Output::new(p.PB14, Level::High, Speed::Low);
 
     loop {
-        if button.is_high().unwrap() {
+        if unwrap!(button.is_high()) {
             info!("high");
-            led1.set_high().unwrap();
-            led3.set_low().unwrap();
+            unwrap!(led1.set_high());
+            unwrap!(led3.set_low());
         } else {
             info!("low");
-            led1.set_low().unwrap();
-            led3.set_high().unwrap();
+            unwrap!(led1.set_low());
+            unwrap!(led3.set_high());
         }
     }
 }