CHANGLOG markdown fix
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6affad9..2577503 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,8 +3,10 @@
* Add support for Dart 2.0 library changes to Stream and StreamTransformer.
Changed classes that implement `StreamTransformer` to extend
`StreamTransformerBase`, and changed signatures of `firstWhere`, `lastWhere`,
- and `singleWhere` on classes extending `Stream`. See also
- https://github.com/dart-lang/sdk/issues/31847
+ and `singleWhere` on classes extending `Stream`. See
+ also [issue 31847][sdk#31847].
+
+ [sdk#31847]: https://github.com/dart-lang/sdk/issues/31847
## 2.0.3