Merge pull request rails#27739 from pvalena/unlock-minitest

New minitest 'assert false' message

Author: rafaelfranca

railties/test/application/test_test.rb

@@ -55,7 +55,7 @@ def test_truth
         end
       RUBY
 
-      assert_unsuccessful_run "unit/foo_test.rb", "Failed assertion"
+      assert_unsuccessful_run "unit/foo_test.rb", "Expected false to be truthy"
     end
 
     test "integration test" do