Change on_debugger to register_debugger.

src/api/events.rs

@@ -264,7 +264,7 @@ impl Engine {
     /// Exported under the `debugging` feature only.
     #[cfg(feature = "debugging")]
     #[inline(always)]
-    pub fn on_debugger(
+    pub fn register_debugger(
         &mut self,
         init: impl Fn() -> Dynamic + SendSync + 'static,
         callback: impl Fn(

src/bin/rhai-dbg.rs

@@ -220,7 +220,7 @@ fn main() {
     // Hook up debugger
     let lines: Vec<_> = script.trim().split('\n').map(|s| s.to_string()).collect();
 
-    engine.on_debugger(
+    engine.register_debugger(
         // Store the current source in the debugger state
         || "".into(),
         // Main debugging interface