[CQ] [linter] anticipate strict_top_level_inference

Make `main` function returns explicit in anticipation of `strict_top_level_inference`.


Change-Id: I9fe087478b748594e49a586b033412263fda7920
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/412383
Commit-Queue: Konstantin Shcheglov <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>
Reviewed-by: Konstantin Shcheglov <[email protected]>
Auto-Submit: Phil Quitslund <[email protected]>

Author: pq

pkg/linter/test/pubspec_test.dart

@@ -6,7 +6,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(BadPubspecTest);
   });

pkg/linter/test/rules/always_declare_return_types_test.dart

@@ -6,7 +6,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AlwaysDeclareReturnTypesTest);
   });

pkg/linter/test/rules/always_put_control_body_on_new_line_test.dart

@@ -7,7 +7,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AlwaysPutControlBodyOnNewLineTest);
   });

pkg/linter/test/rules/always_put_required_named_parameters_first_test.dart

@@ -6,7 +6,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     // TODO(srawlins): Add tests for field formal parameters.
     // TODO(srawlins): Add tests for super formal parameters.

pkg/linter/test/rules/always_specify_types_test.dart

@@ -6,7 +6,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AlwaysSpecifyTypesTest);
   });

pkg/linter/test/rules/always_use_package_imports_test.dart

@@ -6,7 +6,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AlwaysUsePackageImportsTest);
   });

pkg/linter/test/rules/analyzer_public_api_test.dart

@@ -7,7 +7,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AnalyzerPublicApiTest);
   });

pkg/linter/test/rules/analyzer_use_new_elements_test.dart

@@ -9,7 +9,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AnalyzerUseNewElementsTest);
   });

pkg/linter/test/rules/annotate_overrides_test.dart

@@ -6,7 +6,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AnnotateOverridesTest);
   });

pkg/linter/test/rules/annotate_redeclares_test.dart

@@ -6,7 +6,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../rule_test_support.dart';
 
-main() {
+void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AnnotateRedeclaresTest);
   });