Tweak some comments

Marlin/src/Marlin.cpp

   #endif
 
   #if ENABLED(USE_CONTROLLER_FAN)
-    SET_OUTPUT(CONTROLLER_FAN_PIN); //Set pin used for driver cooling fan
+    SET_OUTPUT(CONTROLLER_FAN_PIN);
   #endif
 
   #if HAS_STEPPER_RESET
   #endif
 
   #if (ENABLED(Z_PROBE_SLED) || ENABLED(SOLENOID_PROBE)) && HAS_SOLENOID_1
-    OUT_WRITE(SOL1_PIN, LOW); // turn it off
+    OUT_WRITE(SOL1_PIN, LOW); // OFF
   #endif
 
   #if HAS_HOME
   #endif
 
   #if PIN_EXISTS(STAT_LED_RED)
-    OUT_WRITE(STAT_LED_RED_PIN, LOW); // turn it off
+    OUT_WRITE(STAT_LED_RED_PIN, LOW); // OFF
   #endif
 
   #if PIN_EXISTS(STAT_LED_BLUE)
-    OUT_WRITE(STAT_LED_BLUE_PIN, LOW); // turn it off
+    OUT_WRITE(STAT_LED_BLUE_PIN, LOW); // OFF
   #endif
 
   #if HAS_COLOR_LEDS