fix room_send example, cargo fmt/clippy

src/async_client.rs

@@ -831,7 +831,8 @@ impl AsyncClient {
     /// * `content` - The content of the message event.
     ///
     /// * `txn_id` - A unique `Uuid` that can be attached to a `MessageEvent` held
-    /// in it's unsigned field as `transaction_id`.
+    /// in it's unsigned field as `transaction_id`. If not given one is created for the
+    /// message.
     ///
     /// # Example
     /// ```no_run
@@ -856,7 +857,7 @@ impl AsyncClient {
     ///     relates_to: None,
     /// });
     /// let txn_id = Uuid::new_v4();
-    /// client.room_send(&room_id, content, Some(uuid)).await.unwrap();
+    /// client.room_send(&room_id, content, Some(txn_id)).await.unwrap();
     /// })
     /// ```
     pub async fn room_send(

src/request_builder.rs

@@ -315,7 +315,8 @@ mod test {
         };
 
         let mut builder = RoomBuilder::new();
-        builder.creation_content(false)
+        builder
+            .creation_content(false)
             .initial_state(vec![])
             .visibility(Visibility::Public)
             .name("room_name")
@@ -363,7 +364,8 @@ mod test {
         };
 
         let mut builder = RoomMessageBuilder::new();
-        builder.room_id(RoomId::try_from("!roomid:example.com").unwrap())
+        builder
+            .room_id(RoomId::try_from("!roomid:example.com").unwrap())
             .from("t47429-4392820_219380_26003_2265".to_string())
             .to("t4357353_219380_26003_2265".to_string())
             .direction(Direction::Backward)