Missing newlines after docComments in generated code

[DanTup]

Given this macro:

macro class WithDoc implements MethodDefinitionMacro {
  const WithDoc();

  @override
  void buildDefinitionForMethod(
    MethodDeclaration method,
    FunctionDefinitionBuilder builder,
  )  {
    builder.augment(
      FunctionBodyCode.fromString('''
{
  throw UnimplementedError();
}
'''),
      docComments: CommentCode.fromString('  /// This is an empty method'),
    );
  }
}

You get generated code like this:

augment class B {
  /// This is an empty method  augment void a() {
  throw UnimplementedError();
}

}

There is no newline after the doc comment so augment void a() { is commented out and the code is invalid.

[lrhn]

(Should we have an "area-macros" for the implementation of macros?)

[johnniwinther]

@jakemac53 I think this comes from the shared code.

[jakemac53]

Fix pending here https://dart-review.googlesource.com/c/sdk/+/356260