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Fixes a minor typo in a doc comment for `PageRouteBuilder`. There's no
specific issue for this as I wasn't sure that was a necessary step for
typo PRs, but one can be made if necessary.

## Pre-launch Checklist

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Fixes a minor typo in a doc comment for `PageRouteBuilder`. There's no
specific issue for this as I wasn't sure that was a necessary step for
typo PRs, but one can be made if necessary.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [?] I listed at least one issue that this PR fixes in the description
above.
  - Do I need an issue opened for a minor typo?
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

**Note**: The Flutter team is currently trialing the use of [Gemini Code
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Roll Flutter from 908012d58baa to e11e2c11288b (39 revisions)

flutter/flutter@908012d...e11e2c1

2025-10-08 [email protected] Configure FfiNative resolver on dart:io (flutter/flutter#176621)
2025-10-08 [email protected] Marks Linux_pixel_7pro service_extensions_test to be unflaky (flutter/flutter#176700)
2025-10-08 [email protected] Keyboard Animation Fix (flutter/flutter#176418)
2025-10-08 [email protected] Feat: Add carousel view builder (flutter/flutter#172837)
2025-10-08 [email protected] Roll Skia from d10a0d877ff4 to ea7cdbc6b986 (15 revisions) (flutter/flutter#176686)
2025-10-08 [email protected] Roll Fuchsia Linux SDK from jJr3my9C6TwYWPygi... to xrIAL91ngrd-wNr9S... (flutter/flutter#176682)
2025-10-08 [email protected] Fix InputDecoration helper/error padding is not compliant (flutter/flutter#176353)
2025-10-08 [email protected] Fix PopupMenu does not update when PopupMenuTheme in Theme changes. (flutter/flutter#175513)
2025-10-07 [email protected] Roll Dart SDK to 3.10.0-290.1.beta (flutter/flutter#176629)
2025-10-07 [email protected] [ Tool ] Output `app.dtd` and `app.devTools` in machine mode (flutter/flutter#176655)
2025-10-07 [email protected] Rename UIScene integration test projects and fix Xcode compatibility (flutter/flutter#176635)
2025-10-07 [email protected] Selecting an implementation widget with the on-device inspector opens the code location for the nearest project widget (flutter/flutter#176530)
2025-10-07 [email protected] Migrate to `WidgetStateInputBorder` (flutter/flutter#176386)
2025-10-07 [email protected] Make it clear that you need to install clangd in VSCode intellisense c++ config (flutter/flutter#176609)
2025-10-07 [email protected] Bump the customer tests to pick up an update to Zulip's tests. (flutter/flutter#176463)
2025-10-07 [email protected] Roll Packages from d3ef88b to 8ca6416 (2 revisions) (flutter/flutter#176633)
2025-10-07 [email protected] Add fallback for 'scene:willConnectToSession:options' (flutter/flutter#176580)
2025-10-07 [email protected] Roll Skia from d09786dfb854 to d10a0d877ff4 (11 revisions) (flutter/flutter#176616)
2025-10-07 [email protected] [ Widget Preview ] Rework UI and theming (flutter/flutter#176581)
2025-10-07 [email protected] Handle FlutterEngine registration when embedded in Multi-Scene apps (flutter/flutter#176490)
2025-10-07 [email protected] Fix code style in Linux embedder template (flutter/flutter#176256)
2025-10-07 [email protected] Add tooling to migrate to UIScene (flutter/flutter#176427)
2025-10-06 [email protected] Bump customer tests.version to 986c4326b4e4bb4e37bc963c2cc2aaa10b943859 (flutter/flutter#176594)
2025-10-06 [email protected] Fix typo in pages.dart (flutter/flutter#176438)
2025-10-06 [email protected] Fix: Update anchorRect for overlayBuilder when anchor moves (flutter/flutter#169814)
2025-10-06 [email protected] Roll Fuchsia Linux SDK from Zm6K_3gP3VCaMy9rH... to jJr3my9C6TwYWPygi... (flutter/flutter#176591)
2025-10-06 [email protected] Fix deprecated configureStatusBarForFullscreenFlutterExperience for Android 15+ (flutter/flutter#175501)
2025-10-06 [email protected] updates docs for flutter engine footprint (flutter/flutter#176217)
2025-10-06 [email protected] [ Widget Preview ] Fix `WidgetInspectorService` override (flutter/flutter#176550)
2025-10-06 [email protected] Fix NavigatorBar lacks visual feedback (flutter/flutter#175182)
2025-10-06 [email protected] Roll Packages from e401aeb to d3ef88b (4 revisions) (flutter/flutter#176582)
2025-10-06 [email protected] Roll Dart SDK from 898380a41c90 to 6b0193498f09 (2 revisions) (flutter/flutter#176576)
2025-10-06 [email protected] Roll Skia from bc7cf194f4ee to d09786dfb854 (1 revision) (flutter/flutter#176577)
2025-10-06 [email protected] Roll vulkan-deps to a9e2ca3b (flutter/flutter#176322)
2025-10-06 [email protected] Add an AppDelegate callback for implicit FlutterEngines (flutter/flutter#176240)
2025-10-06 [email protected] Roll Skia from 45191c22b15c to bc7cf194f4ee (2 revisions) (flutter/flutter#176572)
2025-10-06 [email protected] [ Widget Preview ] Fix type error when retrieving flags from persistent preferences (flutter/flutter#176546)
2025-10-06 [email protected] Roll Skia from 1fd0ca1f2120 to 45191c22b15c (3 revisions) (flutter/flutter#176556)
2025-10-05 [email protected] Roll Dart SDK from 016a8c0045fd to 898380a41c90 (1 revision) (flutter/flutter#176549)

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using the controls here:
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Please CC [email protected],[email protected] on the revert to ensure that a human
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...

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Fixes a minor typo in a doc comment for `PageRouteBuilder`. There's no
specific issue for this as I wasn't sure that was a necessary step for
typo PRs, but one can be made if necessary.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [?] I listed at least one issue that this PR fixes in the description
above.
  - Do I need an issue opened for a minor typo?
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

**Note**: The Flutter team is currently trialing the use of [Gemini Code
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