AP_Mission: Fix typos

libraries/AP_Mission/AP_Mission.cpp

@@ -783,7 +783,7 @@ MAV_MISSION_RESULT AP_Mission::mavlink_int_to_mission_cmd(const mavlink_mission_
         }
     }
 
-    // if we got this far then it must have been succesful
+    // if we got this far then it must have been successful
     return MAV_MISSION_ACCEPTED;
 }
 
@@ -1437,7 +1437,7 @@ void AP_Mission::init_jump_tracking()
 /// get_jump_times_run - returns number of times the jump command has been run
 int16_t AP_Mission::get_jump_times_run(const Mission_Command& cmd)
 {
-    // exit immediatley if cmd is not a do-jump command or target is invalid
+    // exit immediately if cmd is not a do-jump command or target is invalid
     if ((cmd.id != MAV_CMD_DO_JUMP) || (cmd.content.jump.target >= (unsigned)_cmd_total) || (cmd.content.jump.target == 0)) {
         // To-Do: log an error?
         return AP_MISSION_JUMP_TIMES_MAX;

libraries/AP_Mission/AP_Mission.h

@@ -7,7 +7,7 @@
  *   The AP_Mission library:
  *   - responsible for managing a list of commands made up of "nav", "do" and "conditional" commands
  *   - reads and writes the mission commands to storage.
- *   - provides easy acces to current, previous and upcoming waypoints
+ *   - provides easy access to current, previous and upcoming waypoints
  *   - calls main program's command execution and verify functions.
  *   - accounts for the DO_JUMP command
  *