AP_ICEngine: minor format and typo fixes

libraries/AP_ICEngine/AP_ICEngine.cpp

@@ -24,7 +24,7 @@ const AP_Param::GroupInfo AP_ICEngine::var_info[] = {
 
     // @Param: ENABLE
     // @DisplayName: Enable ICEngine control
-    // @Description: This enables internal combusion engine control
+    // @Description: This enables internal combustion engine control
     // @Values: 0:Disabled, 1:Enabled
     // @User: Advanced
     AP_GROUPINFO_FLAGS("ENABLE", 0, AP_ICEngine, enable, 0, AP_PARAM_FLAG_ENABLE),
@@ -51,10 +51,10 @@ const AP_Param::GroupInfo AP_ICEngine::var_info[] = {
     // @Units: s
     // @Range: 1 10
     AP_GROUPINFO("START_DELAY", 3, AP_ICEngine, starter_delay, 2),
-    
+
     // @Param: RPM_THRESH
     // @DisplayName: RPM threshold
-    // @Description: This is the measured RPM above which tne engine is considered to be running
+    // @Description: This is the measured RPM above which the engine is considered to be running
     // @User: Standard
     // @Range: 100 100000
     AP_GROUPINFO("RPM_THRESH", 4, AP_ICEngine, rpm_threshold, 100),
@@ -100,7 +100,7 @@ const AP_Param::GroupInfo AP_ICEngine::var_info[] = {
     // @User: Standard
     // @Range: 0 100
     AP_GROUPINFO("START_PCT", 10, AP_ICEngine, start_percent, 5),
-    
+
     AP_GROUPEND    
 };
 
@@ -211,7 +211,7 @@ void AP_ICEngine::update(void)
             state = ICE_OFF;
         }
     }
-    
+
     /* now set output channels */
     switch (state) {
     case ICE_OFF:
@@ -225,7 +225,7 @@ void AP_ICEngine::update(void)
         SRV_Channels::set_output_pwm(SRV_Channel::k_ignition, pwm_ignition_on);
         SRV_Channels::set_output_pwm(SRV_Channel::k_starter,  pwm_starter_off);
         break;
-        
+
     case ICE_STARTING:
         SRV_Channels::set_output_pwm(SRV_Channel::k_ignition, pwm_ignition_on);
         SRV_Channels::set_output_pwm(SRV_Channel::k_starter,  pwm_starter_on);