diff --git a/libraries/AP_Motors/examples/AP_Motors_test/AP_Motors_test.pde b/libraries/AP_Motors/examples/AP_Motors_test/AP_Motors_test.pde
index e9148cf303..72fc375375 100644
--- a/libraries/AP_Motors/examples/AP_Motors_test/AP_Motors_test.pde
+++ b/libraries/AP_Motors/examples/AP_Motors_test/AP_Motors_test.pde
@@ -1,7 +1,7 @@
 /*
-  Example of AP_Motors library.
-  Code by Randy Mackay. DIYDrones.com
-*/
+ *  Example of AP_Motors library.
+ *  Code by Randy Mackay. DIYDrones.com
+ */
 
 // AVR runtime
 #include <avr/io.h>
@@ -46,7 +46,7 @@ RC_Channel rc1, rc2, rc3, rc4;
 
 // uncomment the row below depending upon what frame you are using
 //AP_MotorsTri	motors(AP_MOTORS_APM1, &APM_RC, &rc1, &rc2, &rc3, &rc4);
-AP_MotorsQuad	motors(AP_MOTORS_APM2, &APM_RC, &rc1, &rc2, &rc3, &rc4);
+AP_MotorsQuad   motors(AP_MOTORS_APM2, &APM_RC, &rc1, &rc2, &rc3, &rc4);
 //AP_MotorsHexa	motors(AP_MOTORS_APM1, &APM_RC, &rc1, &rc2, &rc3, &rc4);
 //AP_MotorsY6	motors(AP_MOTORS_APM1, &APM_RC, &rc1, &rc2, &rc3, &rc4);
 //AP_MotorsOcta	motors(AP_MOTORS_APM1, &APM_RC, &rc1, &rc2, &rc3, &rc4);
@@ -56,59 +56,59 @@ AP_MotorsQuad	motors(AP_MOTORS_APM2, &APM_RC, &rc1, &rc2, &rc3, &rc4);
 
 // setup
 void setup()
-{  
-	Serial.begin(115200);
-	Serial.println("AP_Motors library test ver 1.0");
+{
+    Serial.begin(115200);
+    Serial.println("AP_Motors library test ver 1.0");
 
-	RC_Channel::set_apm_rc(&APM_RC);
-	APM_RC.Init( &isr_registry );		// APM Radio initialization
+    RC_Channel::set_apm_rc(&APM_RC);
+    APM_RC.Init( &isr_registry );               // APM Radio initialization
 
-	// motor initialisation
-	motors.set_update_rate(490);
-	motors.set_frame_orientation(AP_MOTORS_X_FRAME);
-	motors.set_min_throttle(130);
-	motors.set_max_throttle(850);
-	motors.Init();  // initialise motors
+    // motor initialisation
+    motors.set_update_rate(490);
+    motors.set_frame_orientation(AP_MOTORS_X_FRAME);
+    motors.set_min_throttle(130);
+    motors.set_max_throttle(850);
+    motors.Init();      // initialise motors
 
-	motors.enable();
-	motors.output_min();
+    motors.enable();
+    motors.output_min();
 
-	delay(1000);
+    delay(1000);
 }
 
 // loop
 void loop()
 {
-	int value;
+    int value;
 
-	// display help
-	Serial.println("Press 't' to test motors.  Becareful they will spin!");
+    // display help
+    Serial.println("Press 't' to test motors.  Becareful they will spin!");
 
-	// wait for user to enter something
-	while( !Serial.available() ) {
-	    delay(20);
-	}
-	
-	// get character from user
-	value = Serial.read();
+    // wait for user to enter something
+    while( !Serial.available() ) {
+        delay(20);
+    }
 
-	// test motors
-	if( value == 't' || value == 'T' ) {
-		Serial.println("testing motors...");
-		motors.armed(true);
-		motors.output_test();
-		motors.armed(false);
-		Serial.println("finished test.");
-	}
+    // get character from user
+    value = Serial.read();
+
+    // test motors
+    if( value == 't' || value == 'T' ) {
+        Serial.println("testing motors...");
+        motors.armed(true);
+        motors.output_test();
+        motors.armed(false);
+        Serial.println("finished test.");
+    }
 }
 
 // print motor output
 void print_motor_output()
 {
-	int8_t i;
-	for(i=0; i<AP_MOTORS_MAX_NUM_MOTORS; i++) {
-		if( motors.motor_enabled[i] ) {
-			Serial.printf("\t%d %d",i,motors.motor_out[i]);
-		}
-	}
+    int8_t i;
+    for(i=0; i<AP_MOTORS_MAX_NUM_MOTORS; i++) {
+        if( motors.motor_enabled[i] ) {
+            Serial.printf("\t%d %d",i,motors.motor_out[i]);
+        }
+    }
 }
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