Update the docs of `dialogue/mod.rs`
//! dialogue: MyDialogue,
//! (full_name,): (String,), // Available from `State::ReceiveAge`.
//! ) -> anyhow::Result<()> {
-//! match msg.text() {
-//! Some(number) => match number.parse::<u8>() {
-//! Ok(age) => {
+//! match msg.text().map(|text| text.parse::<u8>()) {
+//! Some(Ok(age)) => {
//! bot.send_message(msg.chat.id, "What's your location?").await?;
//! dialogue.update(State::ReceiveLocation { full_name, age }).await?;
//! }
//! _ => {
//! bot.send_message(msg.chat.id, "Send me a number.").await?;
//! }
-//! },
-//! None => {
-//! bot.send_message(msg.chat.id, "Send me a text message.").await?;
-//! }
//! }
//!
//! Ok(())
