[enhanced-parts] Language feature docs

[eernstg]

[dart-github-bot]

Summary: The user is requesting documentation for the "enhanced-parts" language feature, which is likely a new or recently added feature to Dart.

[lrhn]

@itsjustkevin It's unclear what this headline covers. It can be public-facing documention (area-documentation) or feature specification (area-language).
Would it be possible to have the script include some text in the first issue comment?

[itsjustkevin]

@lrhn i can update it. Is there a reason for a comment instead of writing a body to the issue? Does the triage bot depend on comments?

Either way, I’ll put a doc together covering these issues to update them.

[lrhn]

I think I meant a body. I just think of the issue body as the first comment.