tests+tools: minor code cleanup

Change-Id: Ic3356d4a18a8e5eeb45fc076fc0563c3d1549c8a
diff --git a/tests/core/config-file.t.cpp b/tests/core/config-file.t.cpp
index c2ceb85..05b2722 100644
--- a/tests/core/config-file.t.cpp
+++ b/tests/core/config-file.t.cpp
@@ -325,7 +325,7 @@
   BOOST_CHECK(subB.allCallbacksFired());
 }
 
-BOOST_AUTO_TEST_SUITE_END()
+BOOST_AUTO_TEST_SUITE_END() // TestConfigFile
 
 } // namespace tests
 } // namespace nfd