From ad4d841b8afede6f5f65e1ea3c8986b1b57d9ddf Mon Sep 17 00:00:00 2001
From: Lorenz Meier <lm@inf.ethz.ch>
Date: Wed, 4 Nov 2015 10:46:29 +0100
Subject: [PATCH] Mixer command: Clean up output

---
 src/systemcmds/mixer/mixer.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/systemcmds/mixer/mixer.cpp b/src/systemcmds/mixer/mixer.cpp
index 56419714b5..c83eabc9a7 100644
--- a/src/systemcmds/mixer/mixer.cpp
+++ b/src/systemcmds/mixer/mixer.cpp
@@ -93,12 +93,12 @@ mixer_main(int argc, char *argv[])
 static void
 usage(const char *reason)
 {
-	if (reason) {
-		PX4_INFO("%s\n", reason);
+	if (reason && *reason) {
+		PX4_INFO("%s", reason);
 	}
 
-	PX4_INFO("usage:\n");
-	PX4_INFO("  mixer load <device> <filename>\n");
+	PX4_INFO("usage:");
+	PX4_INFO("  mixer load <device> <filename>");
 }
 
 static int