Fix USubscription doc tests

The doc tests had not been updated yet to reflect the changes
introduced to the UTransport trait's functions for matching on
source and sink address patterns.

Author: sophokles73

src/core/usubscription.rs

@@ -49,15 +49,15 @@ use async_trait::async_trait;
 /// #             todo!()
 /// #         }
 /// #
-/// #         async fn receive(&self, topic: UUri) -> Result<UMessage, UStatus> {
+/// #         async fn receive(&self, source_filter: &UUri, sink_filter: Option<&UUri>) -> Result<UMessage, UStatus> {
 /// #             todo!()
 /// #         }
 /// #
-/// #         async fn register_listener(&self, topic: UUri, listener: Arc<dyn UListener>) -> Result<(), UStatus> {
+/// #         async fn register_listener(&self, source_filter: &UUri, sink_filter: Option<&UUri>, listener: Arc<dyn UListener>) -> Result<(), UStatus> {
 /// #             Ok(())
 /// #         }
 /// #
-/// #         async fn unregister_listener(&self, topic: UUri, listener: Arc<dyn UListener>) -> Result<(), UStatus> {
+/// #         async fn unregister_listener(&self, source_filter: &UUri, sink_filter: Option<&UUri>, listener: Arc<dyn UListener>) -> Result<(), UStatus> {
 /// #             Ok(())
 /// #         }
 /// #     }
@@ -213,7 +213,7 @@ use async_trait::async_trait;
 /// let subscription_response = usub.subscribe(subscription_request).await?;
 /// let success_code = subscription_response.status.code.enum_value_or(UCode::UNKNOWN);
 /// if success_code == UCode::OK {
-///     let register_success = up_client.register_listener(door_uuri.clone(), my_listener.clone()).await;
+///     let register_success = up_client.register_listener(&door_uuri, None, my_listener.clone()).await;
 /// } else {
 ///     match success_code {
 ///         UCode::NOT_FOUND => { /* handle topic not found */ }
@@ -227,7 +227,7 @@ use async_trait::async_trait;
 ///     ..Default::default()
 /// };
 /// let unsubscribe_result = usub.unsubscribe(unsubscribe_request).await?;
-/// let unregister_success = up_client.register_listener(door_uuri.clone(), my_listener.clone()).await;
+/// let unregister_success = up_client.register_listener(&door_uuri, None, my_listener.clone()).await;
 /// #
 /// # Ok(())
 /// # }