diff --git a/CHANGELOG.md b/CHANGELOG.md
index 71350ccef..440cb162c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,12 +15,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - `DOMNode.query_one` now raises a `TooManyMatches` exception if there is
   more than one matching node.
   https://github.com/Textualize/textual/issues/1096
+- `App.mount` and `Widget.mount` have new `before` and `after` parameters https://github.com/Textualize/textual/issues/778
 
 ### Added
 
 - Added `init` param to reactive.watch
 - `CSS_PATH` can now be a list of CSS files https://github.com/Textualize/textual/pull/1079
 - Added `DOMQuery.only_one` https://github.com/Textualize/textual/issues/1096
+- Writes to stdout are now done in a thread, for smoother animation. https://github.com/Textualize/textual/pull/1104
 
 ## [0.3.0] - 2022-10-31
 
diff --git a/src/textual/app.py b/src/textual/app.py
index ba304203d..cf04d8e7c 100644
--- a/src/textual/app.py
+++ b/src/textual/app.py
@@ -129,6 +129,8 @@ ReturnType = TypeVar("ReturnType")
 
 
 class _NullFile:
+    """A file-like where writes go nowhere."""
+
     def write(self, text: str) -> None:
         pass