Fix spacing in some conditional blocks

Marlin/Marlin_main.cpp

@@ -4009,6 +4009,7 @@ inline void gcode_M111() {
     SERIAL_ECHOLNPGM(MSG_DEBUG_DRYRUN);
     disable_all_heaters();
   }
+
   #if ENABLED(DEBUG_LEVELING_FEATURE)
     if (marlin_debug_flags & DEBUG_LEVELING) {
       SERIAL_ECHO_START;