dartfmt removes "?" in "()?" typed field

[davidmorgan]

While adding records support to built_value I thought I'd check the base case, and it doesn't quite work as dartfmt eats the ? in the generated output.

> cat foo.dart
class A {
  ()? x;
}

dartfmt foo.dart
Hit a bug in the formatter when formatting foo.dart.
The formatter produced unexpected output. Input was:
class A {
  ()? x;
}

Which formatted to:
class A {
  () x;
}

[munificent]

Oof, that's bad. I'll take a look.

[tekert]

Seem like a token(node.question); is missing when RecordTypeAnnotation fields are empty.

dart_style/lib/src/source_visitor.dart

Line 2508 in a36eb20

return;