Fix typo (#19555)
diff --git a/packages/flutter/lib/src/cupertino/app.dart b/packages/flutter/lib/src/cupertino/app.dart
index 0a6fa16..4ba549f 100644
--- a/packages/flutter/lib/src/cupertino/app.dart
+++ b/packages/flutter/lib/src/cupertino/app.dart
@@ -45,7 +45,7 @@
/// This widget also configures the observer of the top-level [Navigator] (if
/// any) to perform [Hero] animations.
///
-/// Using this widget with caution on Android since it may produce behaviors
+/// Use this widget with caution on Android since it may produce behaviors
/// Android users are not expecting such as:
///
/// * Pages will be dismissible via a back swipe.
