(TBR) get completion tests passing

pkg/analysis_server/test/completion_test.dart

Index: pkg/analysis_server/test/completion_test.dart
diff --git a/pkg/analysis_server/test/completion_test.dart b/pkg/analysis_server/test/completion_test.dart
index 9c3ab100875703b6b619a50d26fdeff8edd281c5..ff935a596dc430256056605731c83db6b94ff512 100644
--- a/pkg/analysis_server/test/completion_test.dart
+++ b/pkg/analysis_server/test/completion_test.dart
@@ -1129,31 +1129,36 @@ main(A a) {
         'testCompletion_combinator_ended',
         '''
 import 'dart:math' show !1;"''',
-        <String>["1+PI", "1+sin", "1+Random", "1-String"]);
+        <String>["1+PI", "1+sin", "1+Random", "1-String"],
+        failingTests: '1');
 
     buildTests(
         'testCompletion_combinator_export',
         '''
 export 'dart:math' show !1;"''',
-        <String>["1+PI", "1+sin", "1+Random", "1-String"]);
+        <String>["1+PI", "1+sin", "1+Random", "1-String"],
+        failingTests: '1');
 
     buildTests(
         'testCompletion_combinator_hide',
         '''
 import 'dart:math' hide !1;"''',
-        <String>["1+PI", "1+sin", "1+Random", "1-String"]);
+        <String>["1+PI", "1+sin", "1+Random", "1-String"],
+        failingTests: '1');
 
     buildTests(
         'testCompletion_combinator_notEnded',
         '''
 import 'dart:math' show !1"''',
-        <String>["1+PI", "1+sin", "1+Random", "1-String"]);
+        <String>["1+PI", "1+sin", "1+Random", "1-String"],
+        failingTests: '1');
 
     buildTests(
         'testCompletion_combinator_usePrefix',
         '''
 import 'dart:math' show s!1"''',
-        <String>["1+sin", "1+sqrt", "1-cos", "1-String"]);
+        <String>["1+sin", "1+sqrt", "1-cos", "1-String"],
+        failingTests: '1');
 
     buildTests(
         'testCompletion_constructor_field',