Fix comment typo (#49129)
diff --git a/packages/flutter/lib/src/widgets/binding.dart b/packages/flutter/lib/src/widgets/binding.dart
index 291e7ba..8e3d813 100644
--- a/packages/flutter/lib/src/widgets/binding.dart
+++ b/packages/flutter/lib/src/widgets/binding.dart
@@ -702,7 +702,7 @@
/// Pump the build and rendering pipeline to generate a frame.
///
/// This method is called by [handleDrawFrame], which itself is called
- /// automatically by the engine when when it is time to lay out and paint a
+ /// automatically by the engine when it is time to lay out and paint a
/// frame.
///
/// Each frame consists of the following phases:
