From 62e2b2e66f4fefa493c4ac91c121c7484f67b7be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@riseup.net>
Date: Thu, 27 Jun 2019 15:32:21 +0200
Subject: [PATCH] [rubygems/rubygems] Improve `rake package` test error message

https://github.com/rubygems/rubygems/commit/be962ca0c4
---
 test/rubygems/test_rake_package.rb | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/test/rubygems/test_rake_package.rb b/test/rubygems/test_rake_package.rb
index 14e2be319e..63a7a3384c 100644
--- a/test/rubygems/test_rake_package.rb
+++ b/test/rubygems/test_rake_package.rb
@@ -8,7 +8,15 @@ class TestRakePackage < Minitest::Test
   def test_builds_ok
     output, status = Open3.capture2e("rake package")
 
-    assert_equal true, status.success?, "Expected `rake package` to work, but got errors: #{output}"
+    assert_equal true, status.success?, <<~MSG.chomp
+      Expected `rake package` to work, but got errors:
+
+      ```
+      #{output}
+      ```
+
+      If you have added or removed files, make sure you run `rake update_manifest` to update the `Manifest.txt` accordingly
+    MSG
   end
 
 end