improve keyword suggestions - fixes #24016

pkg/analysis_server/test/completion_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.
 
 library test.completion.support;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:unittest/unittest.dart';
@@ skipping 1583 matching lines @@
   var v2 = p is !3;
   var v2 = p is!4;
 }''',
         <String>[
           "1+MyClass",
           "2+MyClass",
           "3+MyClass",
           "3-v1",
           "4+is",
           "4-isVariable"
-        ],
-        failingTests: '4');
+        ]);
 
     buildTests(
         'testCompletion_is_asIdentifierStart',
         '''
 main(p) {
   var isVisible;
   var v1 = is!1;
   var v2 = is!2
 }''',
         <String>["1+isVisible", "2+isVisible"]);
@@ skipping 22 matching lines @@
         <String>["1+MyClass", "1-justSomeVar"]);
 
     buildTests(
         'testCompletion_is_incompleteStatement2',
         '''
 class MyClass {}
 main(p) {
   var isVariable;
   var v = p is!1
 }''',
-        <String>["1+is", "1-isVariable"],
-        failingTests: '1');
+        <String>["1+is", "1-isVariable"]);
 
     buildTests(
         'testCompletion_keyword_in',
         '''
 class Foo { int input = 7; mth() { if (in!1) {}}}''',
         <String>["1+input"]);
 
     buildTests(
         'testCompletion_keyword_syntheticIdentifier',
         '''
@@ skipping 970 matching lines @@
           "C+catch",
           "D+var",
           "E+void",
           "F+assert",
           "G+continue",
           "H+break",
           "J+if",
           "K+else",
           "L+return"
         ],
-        failingTests: '3BCHK');
+        failingTests: '3BCK');
 
     // operators in function
     buildTests('test015', '''f(a,b,c) => a + b * c !1;''', <String>["1+=="],
         failingTests: '1');
 
     // operators in return
     buildTests(
         'test016',
         '''class X {dynamic f(a,b,c) {return a + b * c !1;}}''',
         <String>["1+=="],
@@ skipping 343 matching lines @@
       } else {
         ++expectedPassCount;
         tester(testName, () {
           CompletionTestCase test = new CompletionTestCase();
           return test.runTest(spec, extraFiles);
         });
       }
     }
   }
 }