(disclaimer: I'm on the Flutter team)

We're looking at ways to make it easier to glance at and understand Flutter code. Here's one experiment: https://github.com/Dart-Code/Dart-Code/issues/383

Notice how we're auto-inserting "synthetic" comments to clearly mark the closing parens/brackets. So far, the feedback has been very positive, it helps improve scanning and reading the code.

Feedback welcome (via the GitHub issue :)