[docs] Improve halconf/mcuconf code examples (#24597)

1 files changed, 8 insertions, 4 deletions

diff --git a/docs/features/ps2_mouse.md b/docs/features/ps2_mouse.md
index 90f4cca827..52443c3ce2 100644
--- a/docs/features/ps2_mouse.md
+++ b/docs/features/ps2_mouse.md
@@ -90,18 +90,22 @@ PS2_ENABLE = yes
 PS2_DRIVER = interrupt
 ```
 
-In your keyboard config.h:
+In your keyboard `config.h`:
 
 ```c
 #define PS2_CLOCK_PIN A8
 #define PS2_DATA_PIN  A9
 ```
 
-And in the chibios specifig halconf.h:
+And in the ChibiOS specific `halconf.h`:
+
 ```c
-#define PAL_USE_CALLBACKS TRUE
-```
+#pragma once
 
+#define PAL_USE_CALLBACKS TRUE // [!code focus]
+
+#include_next <halconf.h>
+```
 
 ### USART Version {#usart-version}