Better message for Rename refactoring changes.

pkg/analysis_server/lib/src/services/refactoring/rename.dart

Index: pkg/analysis_server/lib/src/services/refactoring/rename.dart
diff --git a/pkg/analysis_server/lib/src/services/refactoring/rename.dart b/pkg/analysis_server/lib/src/services/refactoring/rename.dart
index 012b7a1b595ec37714c80dad38d899951f2f4ac5..b22d74d360a491c395cdb0eb5c3b0987b8283fdc 100644
--- a/pkg/analysis_server/lib/src/services/refactoring/rename.dart
+++ b/pkg/analysis_server/lib/src/services/refactoring/rename.dart
@@ -151,7 +151,8 @@ abstract class RenameRefactoringImpl extends RefactoringImpl
 
   @override
   Future<SourceChange> createChange() async {
-    change = new SourceChange(refactoringName);
+    String changeName = "$refactoringName '$oldName' to '$newName'";
+    change = new SourceChange(changeName);
     await fillChange();
     return change;
   }