Rover: Fix typos

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

APMrover2/AP_MotorsUGV.cpp

@@ -107,7 +107,7 @@ AP_MotorsUGV::AP_MotorsUGV(AP_ServoRelayEvents &relayEvents) :
 
 void AP_MotorsUGV::init()
 {
-    // setup servo ouput
+    // setup servo output
     setup_servo_output();
 
     // setup pwm type

APMrover2/radio.cpp

@@ -15,7 +15,7 @@ void Rover::set_control_channels(void)
     channel_throttle->set_angle(100);
     channel_lateral->set_angle(100);
 
-    // Allow to reconfigure ouput when not armed
+    // Allow to reconfigure output when not armed
     if (!arming.is_armed()) {
         g2.motors.setup_servo_output();
         // For a rover safety is TRIM throttle

APMrover2/sailboat.cpp

@@ -6,7 +6,7 @@
 To Do List
  - Improve tacking in light winds and bearing away in strong wings
  - consider drag vs lift sailing differences, ie upwind sail is like wing, dead down wind sail is like parachute
- - max speed paramiter and contoller, for maping you may not want to go too fast
+ - max speed paramiter and controller, for mapping you may not want to go too fast
  - mavlink sailing messages
  - motor sailing, some boats may also have motor, we need to decide at what point we would be better of just motoring in low wind, or for a tight loiter, or to hit waypoint exactly, or if stuck head to wind, or to reverse...
  - smart decision making, ie tack on windshifts, what to do if stuck head to wind

APMrover2/system.cpp

@@ -113,7 +113,7 @@ void Rover::init_ardupilot()
 
     ins.set_log_raw_bit(MASK_LOG_IMU_RAW);
 
-    set_control_channels();  // setup radio channels and ouputs ranges
+    set_control_channels();  // setup radio channels and outputs ranges
     init_rc_in();            // sets up rc channels deadzone
     g2.motors.init();        // init motors including setting servo out channels ranges
     SRV_Channels::enable_aux_servos();
@@ -271,7 +271,7 @@ void Rover::startup_INS_ground(void)
     hal.scheduler->delay(100);
 
     ahrs.init();
-    // say to EKF that rover only move by goind forward
+    // say to EKF that rover only move by going forward
     ahrs.set_fly_forward(true);
     ahrs.set_vehicle_class(AHRS_VEHICLE_GROUND);
 
@@ -287,7 +287,7 @@ void Rover::notify_mode(const Mode *mode)
 }
 
 /*
-  check a digitial pin for high,low (1/0)
+  check a digital pin for high,low (1/0)
  */
 uint8_t Rover::check_digital_pin(uint8_t pin)
 {