Enhance the v0.11 migration guide

Former-commit-id: c4dbff1afe

MIGRATION_GUIDE.md

@@ -6,7 +6,17 @@ Note that the list of required changes is not fully exhaustive and it may lack s
 ### core
 
 Requests can now be `.await`ed directly, without need of `.send()` or `AutoSend`.
-If you previously used `AutoSend` adaptor, you can safely remove it.
+If you previously used `AutoSend` adaptor, you can safely remove it:
+
+```diff,rust
+-let bot = Bot::from_env().auto_send();
++let bot = Bot::from_env();
+```
+
+```diff,rust
+-async fn start(bot: AutoSend<Bot>, dialogue: MyDialogue, msg: Message) -> HandlerResult {
++async fn start(bot: Bot, dialogue: MyDialogue, msg: Message) -> HandlerResult {
+```
 
 `File`'s and `FileMeta`'s fields now don't have `file_` prefix.
 If you previously accessed the fields, you'll need to change remove the prefix:
@@ -52,7 +62,18 @@ See `Sticker` documentation for more information about the new structure.
 
 ### teloxide
 
-<!-- TODO -->
+You can now write `Ok(())` instead of `respond(())` at the end of closures provided to RELPs:
+
+```diff,rust
+teloxide::repl(bot, |bot: Bot, msg: Message| async move {
+    bot.send_dice(msg.chat.id).await?;
+-    respond(())
++    Ok(())
+})
+.await;
+```
+
+This is because REPLs now require the closure to return `RequestError` instead of a generic error type, so type inference works perfectly for a return value. If you use something other than `RequestError`, you can transfer your code to `teloxide::dispatching`, which still permits a generic error type.
 
 ## 0.9 -> 0.10