src: Small improvements

Change-Id: I9850cd6ec2330482915f815d94a2ac2ccaeae7f1
diff --git a/tools/nfd-autoreg.cpp b/tools/nfd-autoreg.cpp
index a219e62..26fba9d 100644
--- a/tools/nfd-autoreg.cpp
+++ b/tools/nfd-autoreg.cpp
@@ -63,7 +63,8 @@
   onNfdCommandFailure(const FaceEventNotification& notification,
                       uint32_t code, const std::string& reason)
   {
-    std::cerr << "FAILED: " << notification << " (code: " << code << ")" << std::endl;
+    std::cerr << "FAILED: " << notification
+              << " (code: " << code << ", reason: " << reason << ")" << std::endl;
   }
 
   bool