Debug-log received characters

src/main.rs

@@ -354,6 +354,8 @@ impl App {
     }
 
     pub fn on_received_character(&mut self, c: char) {
+        log::debug!("Received character: {:?}", c);
+        
         let mut bytes = [0u8; 4];
         let len = c.encode_utf8(&mut bytes).len();
         let cow = Cow::Owned(bytes[0..len].into());