Improve assume_not_null dangerous usage example
@@ -496,12 +496,9 @@ pub trait ExpressionMethods: Expression + Sized {
/// use self::users;
/// let connection = &mut establish_connection();
///
- /// let data = users::table.left_join(posts::table)
- /// .select((
- /// users::id,
- /// (posts::id, posts::author_name.assume_not_null()).nullable()
- /// ))
- /// .load::<(i32, Option<(i32, String)>)>(connection);
+ /// let data = posts::table.left_join(users::table)
+ /// .select((users::id, posts::author_name.assume_not_null()).nullable())
+ /// .load::<Option<(i32, String)>>(connection);
/// // This will cause the `Option` to be `None` where the `left_join` succeeded but the
/// // `author_name` turned out to be `NULL`, because `Option` deserialization relies
/// // on encountering an unexpected `NULL` while deserializing the inner fields.
