"pub cache repair" prints a more detailed summary.

test/cache/repair/handles_failure_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library pub_tests;
 
 import 'package:pub/src/exit_codes.dart' as exit_codes;
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
@@ skipping 31 matching lines @@
     var pub = startPub(args: ["cache", "repair"]);
 
     pub.stdout.expect("Downloading foo 1.2.3...");
     pub.stdout.expect("Downloading foo 1.2.4...");
     pub.stdout.expect("Downloading foo 1.2.5...");
 
     pub.stderr.expect(startsWith("Failed to repair foo 1.2.4. Error:"));
     pub.stderr.expect("HTTP error 404: Not Found");
 
     pub.stdout.expect("Reinstalled 2 packages.");
-    pub.stdout.expect("Failed to reinstall 1 package.");
+    pub.stdout.expect("Failed to reinstall 1 package:");
+    pub.stdout.expect("- foo 1.2.4");
 
     pub.shouldExit(exit_codes.UNAVAILABLE);
   });
 }