Here's the main list. Some just need to use backticks instead of square brackets. Some should just not have square brackets. Some are typos. Some need broader textual refactoring:

• * DragGestureRecognizer.onCancel - property referencing allowedButtonsFilter.
• * DragGestureRecognizer.onDown - property referencing allowedButtonsFilter.
• * DragGestureRecognizer.onEnd - property referencing allowedButtonsFilter.
• * DragGestureRecognizer.onStart - property referencing allowedButtonsFilter.
• * DragGestureRecognizer.onUpdate - property referencing allowedButtonsFilter.
• * DoubleTapGestureRecognizer.onDoubleTap - property referencing allowedButtonsFilter.
• * DoubleTapGestureRecognizer.onDoubleTapCancel - property referencing referencing allowedButtonsFilter.
• * DoubleTapGestureRecognizer.onDoubleTapDown - property referencing allowedButtonsFilter.
• * TapGestureRecognizer - class referencing allowedButtonsFilter.
• * Badge.backgroundColor - property referencing ColorScheme.errorColor.
• * ButtonThemeData.padding - property referencing button.
• * ButtonThemeData.shape - property referencing button.
• * InkSparkle - class referencing containedInkWell.
• * InkSparkle - class referencing rectCallback.
• * InkSparkle.splashFactory - static const field referencing turbulenceSeed.
• * InkSparkle.constantTurbulenceSeedSplashFactory - static const field referencing turbulenceSeed.
• * Switch.adaptive - constructor referencing ThemeData.adaptations.
• * TextButton.defaultStyleOf - method referencing padding.
• * Adaptation.adapt - method referencing ThemeData.adaptations.
• * UndoManager - Class referencing canRedo.
• * UndoManager - Class referencing canUndo.
• * ContextMenuController.markNeedsBuild - method referencing contextMenuBuilder.
• * SliverFadeTransition - class referencing sliver.

And some just refer to not-properly-prefixed elements. These can be updated with a prefix:

• * ImageInfo.clone - method referencing Image.clone.
• * ImageInfo.isCloneOf - method referencing Image.isCloneOf.
• * RawImage - class referencing Image.dispose.
• * RawImage.image - property referencing Image.dispose.

And some just refer to not-imported elements. These can be updated with @docImport:

• * DiagnosticsNode.toTimelineArguments - method referencing Timeline.startSync.
• * compute - top-level function referencing Isolate.run.