Fix PointerEventConverter doc (#128452)

Follow-up to https://github.com/flutter/flutter/pull/128287.

packages/flutter/lib/src/gestures/binding.dart

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
 import 'dart:async';
 import 'dart:collection';
 import 'dart:ui' as ui show PointerDataPacket;

packages/flutter/lib/src/gestures/converter.dart

@@ -53,10 +53,10 @@ abstract final class PointerEventConverter {
   /// Expand the given packet of pointer data into a sequence of framework
   /// pointer events.
   ///
-  /// The `devicePixelRatio` argument (usually given the value from
-  /// [dart:ui.FlutterView.devicePixelRatio]) is used to convert the incoming data
-  /// from physical coordinates to logical pixels. See the discussion at
-  /// [PointerEvent] for more details on the [PointerEvent] coordinate space.
+  /// The `devicePixelRatioForView` is used to obtain the device pixel ratio for
+  /// the view a particular event occurred in to convert its data from physical
+  /// coordinates to logical pixels. See the discussion at [PointerEvent] for
+  /// more details on the [PointerEvent] coordinate space.
   static Iterable<PointerEvent> expand(Iterable<ui.PointerData> data, DevicePixelRatioGetter devicePixelRatioForView) {
     return data
         .where((ui.PointerData datum) => datum.signalKind != ui.PointerSignalKind.unknown)