Fix for issue 22052

pkg/analysis_server/test/services/completion/completion_test_util.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.
 
 library test.services.completion.util;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart' as protocol show Element,
     ElementKind;
@@ skipping 1108 matching lines @@
       assertSuggestLocalVariable('a', 'int');
       assertSuggestLocalFunction('main', null);
       assertSuggestImportedFunction('identical', 'bool');
     });
   }
 
   test_AwaitExpression() {
     // SimpleIdentifier  AwaitExpression  ExpressionStatement
     addTestSource('''
       class A {int x; int y() => 0;}
-      main(){A a; await ^}''');
+      main() async {A a; await ^}''');
     computeFast();
     return computeFull((bool result) {
       assertSuggestLocalVariable('a', 'A');
       assertSuggestLocalFunction('main', null);
       assertSuggestLocalClass('A');
       assertSuggestImportedClass('Object');
     });
   }
 
   test_BinaryExpression_LHS() {
@@ skipping 1480 matching lines @@
       assertNotSuggested('bar2');
       assertNotSuggested('_B');
       assertSuggestLocalClass('Y');
       assertSuggestLocalClass('C');
       assertSuggestLocalVariable('f', null);
       assertNotSuggested('x');
       assertNotSuggested('e');
     });
   }
 }