Fix alignment on Dart snippets on first lines of "Flutter for SwiftUI Developers" page

[jmagman]

Page URL

https://docs.flutter.dev/get-started/flutter-for/swiftui-devs

Page source

No response

Describe the problem

Some of the dart snippets have incorrect whitespace on the first lines:

Expected fix

Indentation should be formatted.

Additional context

No response

I would like to fix this problem.

• [ ] I will try and fix this problem on docs.flutter.dev.

[sagarhedaoo]

Hi! Can I try fixing this?

[atsansone]

@sagarhedaoo : Sure! Make sure to check the Dart files referenced in this page, too.