40 columns                              |
>>> Split before directives.
@deprecated library foo;

@deprecated import 'dart:io';

@deprecated export 'dart:io';
<<<
@deprecated
library foo;

@deprecated
import 'dart:io';

@deprecated
export 'dart:io';
>>> On part.
@foo part "part.dart";
<<<
@foo
part "part.dart";
>>> On part of.
@foo part of bar;
<<<
@foo
part of bar;
>>> Remove blank lines between metadata and directive.
@foo



import 'foo.dart';

@bar

import 'bar.dart';
<<<
@foo
import 'foo.dart';

@bar
import 'bar.dart';