Fix AsExpression doc link
@@ -186,7 +186,8 @@ where
/// database, you should use `i32::to_sql(x, out)` instead of writing to `out`
/// yourself.)
///
-/// Any types which implement this trait should also [`#[derive(AsExpression)]`].
+/// Any types which implement this trait should also
+/// [`#[derive(AsExpression)]`](crate::AsExpression).
///
/// ### Backend specific details
///
@@ -198,7 +199,6 @@ where
/// - For third party backends, consult that backend's documentation.
///
/// [`MysqlType`]: ../mysql/enum.MysqlType.html
-/// [`#[derive(AsExpression)]`]: ../expression/derive.AsExpression.html;
///
/// ### Examples
///
