Update the FAQ

README.md

@@ -334,6 +334,10 @@ Associated links:
  - [Marvin's Marvellous Guide to All Things Webhook](https://core.telegram.org/bots/webhooks)
  - [Using self-signed certificates](https://core.telegram.org/bots/self-signed)
 
+**Q: Can I handle both callback queries and messages within a single dialogue?**
+
+A: Yes, see [`examples/purchase.rs`](examples/purchase.rs).
+
 ## Community bots
 
 Feel free to propose your own bot to our collection!

examples/purchase.rs

@@ -1,5 +1,5 @@
-// This example demonstrates how to deal with messages and callback queries in a
-// single dialogue.
+// This example demonstrates how to deal with messages and callback queries
+// within a single dialogue.
 //
 // # Example
 // ```