message: Example cleanup
diff: @@ -322,7 +322,7 @@ impl Client {
  /// ```no_run
  /// # async fn async_main(client: &tokio_postgres::Client) -> Result<(), tokio_postgres::Error> {
  /// use tokio_postgres::types::ToSql;
  - /// use futures::{pin_mut, StreamExt};
  + /// use futures::{pin_mut, TryStreamExt};
  ///
  /// let params: Vec<String> = vec![
  /// "first param".into(),
  @@ -334,7 +334,7 @@ impl Client {
  /// ).await?;
  ///
  /// pin_mut!(it);
  - /// while let Some(row) = it.next().await.transpose()? {
  + /// while let Some(row) = it.try_next().await? {
  /// let foo: i32 = row.get("foo");
  /// println!("foo: {}", foo);
  /// }
  