Issue 23068. Constructors should have the same const/factory modifiers to match.

pkg/analyzer/test/generated/incremental_resolver_test.dart

Index: pkg/analyzer/test/generated/incremental_resolver_test.dart
diff --git a/pkg/analyzer/test/generated/incremental_resolver_test.dart b/pkg/analyzer/test/generated/incremental_resolver_test.dart
index 40dfb9c350eef21202064d2cb9eeb05540bdc9e6..d880c28f7200e9142f372d9b24f8c124eb8f884d 100644
--- a/pkg/analyzer/test/generated/incremental_resolver_test.dart
+++ b/pkg/analyzer/test/generated/incremental_resolver_test.dart
@@ -305,6 +305,66 @@ class B<T> = Object with M<T>;
 ''');
   }
 
+  void test_false_constructor_keywordConst_add() {
+    _assertDoesNotMatch(r'''
+class A {
+  A();
+}
+''', r'''
+class A {
+  const A();
+}
+''');
+  }
+
+  void test_false_constructor_keywordConst_remove() {
+    _assertDoesNotMatch(r'''
+class A {
+  const A();
+}
+''', r'''
+class A {
+  A();
+}
+''');
+  }
+
+  void test_false_constructor_keywordFactory_add() {
+    _assertDoesNotMatch(r'''
+class A {
+  A();
+  A.foo() {
+    return new A();
+  }
+}
+''', r'''
+class A {
+  A();
+  factory A.foo() {
+    return new A();
+  }
+}
+''');
+  }
+
+  void test_false_constructor_keywordFactory_remove() {
+    _assertDoesNotMatch(r'''
+class A {
+  A();
+  factory A.foo() {
+    return new A();
+  }
+}
+''', r'''
+class A {
+  A();
+  A.foo() {
+    return new A();
+  }
+}
+''');
+  }
+
   void test_false_constructor_parameters_list_add() {
     _assertDoesNotMatch(r'''
 class A {