Fix indentation, stepper.h dependency, etc.

Marlin/src/HAL/HAL_DUE/MarlinSerial_Due.cpp

@@ -105,8 +105,6 @@ ring_buffer_r rx_buffer = { { 0 }, 0, 0 };
 
 #if ENABLED(EMERGENCY_PARSER)
 
-  #include "../../module/stepper.h"
-
   // Currently looking for: M108, M112, M410
   // If you alter the parser please don't forget to update the capabilities in Conditionals_post.h
 
@@ -296,7 +294,7 @@ FORCE_INLINE void store_rxd_char() {
       HWUART->UART_IDR = UART_IDR_TXRDY;
   }
 
-#endif // TX_BUFFER_SIZE
+#endif // TX_BUFFER_SIZE > 0
 
 static void UART_ISR(void) {
   uint32_t status = HWUART->UART_SR;
@@ -436,6 +434,7 @@ void MarlinSerial::flush(void) {
 }
 
 #if TX_BUFFER_SIZE > 0
+
   uint8_t MarlinSerial::availableForWrite(void) {
     CRITICAL_SECTION_START;
     const uint8_t h = tx_buffer.head, t = tx_buffer.tail;

Marlin/src/gcode/gcode.h

@@ -64,7 +64,7 @@
  * G32  - Undock sled (Z_PROBE_SLED only)
  * G33  - Delta Auto-Calibration (Requires DELTA_AUTO_CALIBRATION)
  * G38  - Probe in any direction using the Z_MIN_PROBE (Requires G38_PROBE_TARGET)
- * G42  - Coordinated move to a mesh point (Requires HAS_MESH)
+ * G42  - Coordinated move to a mesh point (Requires MESH_BED_LEVELING, AUTO_BED_LEVELING_BLINEAR, or AUTO_BED_LEVELING_UBL)
  * G90  - Use Absolute Coordinates
  * G91  - Use Relative Coordinates
  * G92  - Set current position to coordinates given

Marlin/src/pins/pins_RAMBO.h

@@ -54,13 +54,6 @@
 #define SERVO2_PIN         24 // Motor header MX3
 #define SERVO3_PIN          5 // PWM header pin 5
 
-//
-// Z Probe (when not Z_MIN_PIN)
-//
-#ifndef Z_MIN_PROBE_PIN
-  #define Z_MIN_PROBE_PIN  30
-#endif
-
 //
 // Limit Switches
 //
@@ -71,6 +64,13 @@
 #define Z_MIN_PIN          10
 #define Z_MAX_PIN          30
 
+//
+// Z Probe (when not Z_MIN_PIN)
+//
+#ifndef Z_MIN_PROBE_PIN
+  #define Z_MIN_PROBE_PIN  30
+#endif
+
 //
 // Steppers
 //