Show the exercise name in the waiting message

Author: mo8it

src/watch/state.rs

@@ -51,8 +51,11 @@ impl<'a> WatchState<'a> {
     pub fn run_current_exercise(&mut self) -> Result<()> {
         self.show_hint = false;
 
-        self.writer
-            .write_all(b"\nChecking the exercise, please wait...")?;
+        writeln!(
+            self.writer,
+            "\nChecking the exercise `{}`. Please wait…",
+            self.app_state.current_exercise().name,
+        )?;
         let success = self
             .app_state
             .current_exercise()