'Rename Constructor' refactoring.

pkg/analysis_services/test/correction/strings_test.dart

Index: pkg/analysis_services/test/correction/strings_test.dart
diff --git a/pkg/analysis_services/test/correction/strings_test.dart b/pkg/analysis_services/test/correction/strings_test.dart
index 2dca487e06b7d6256347fd697f4b8ae954964dd6..1847c2bfebc354af7ce299d338b1586bd3569ed4 100644
--- a/pkg/analysis_services/test/correction/strings_test.dart
+++ b/pkg/analysis_services/test/correction/strings_test.dart
@@ -19,7 +19,6 @@ main() {
 @ReflectiveTestCase()
 class StringsTest {
   void test_capitalize() {
-    expect(capitalize(null), null);
     expect(capitalize(''), '');
     expect(capitalize('a'), 'A');
     expect(capitalize('abc'), 'Abc');
@@ -35,6 +34,13 @@ class StringsTest {
     expect(compareStrings('b', 'a'), 1);
   }
 
+  void test_format() {
+    expect(format('Hello, {0}!', 'John'), 'Hello, John!');
+    expect(
+        format('{0} are you {1}ing?', 'What', 'read'),
+        'What are you reading?');
+  }
+
   void test_isBlank() {
     expect(isBlank(null), isTrue);
     expect(isBlank(''), isTrue);