Fix hints and clean-up obsolete comment syntax (TBR)

pkg/analysis_server/test/edit/sort_members_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/edit/edit_domain.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
@@ skipping 162 matching lines @@
 @MyAnnotation(3)
 export 'dart:aaa';
 export 'dart:bbb';
 
 class MyAnnotation {
   const MyAnnotation(_);
 }
 ''');
   }
 
-  @failingTest
-  test_OK_genericFunctionTypeInComments() async {
+  test_OK_genericFunctionType() async {
     addFile(
         projectPath + '/analysis_options.yaml',
         '''
 analyzer:
   strong-mode: true
 ''');
     addTestFile('''
 class C {
   void caller() {
     Super s = new Super();
     takesSub(s); // <- No warning
   }
 
   void takesSub(Sub s) {}
 }
 
 class Sub extends Super {}
 
 class Super {}
 
 typedef dynamic Func(String x, String y);
 
-Function/*=F*/ allowInterop/*<F extends Function>*/(Function/*=F*/ f) => null;
+F allowInterop<F extends Function>(F f) => null;
 
 Func bar(Func f) {
   return allowInterop(f);
 }
 ''');
     return _assertSorted('''
-Function/*=F*/ allowInterop/*<F extends Function>*/(Function/*=F*/ f) => null;
+F allowInterop<F extends Function>(F f) => null;
 
 Func bar(Func f) {
   return allowInterop(f);
 }
 
 typedef dynamic Func(String x, String y);
 
 class C {
   void caller() {
     Super s = new Super();
@@ skipping 28 matching lines @@
     expect(resultCode, expectedCode);
   }
 
   Future _requestSort() async {
     Request request = new EditSortMembersParams(testFile).toRequest('0');
     Response response = await waitResponse(request);
     var result = new EditSortMembersResult.fromResponse(response);
     fileEdit = result.edit;
   }
 }