Add C hint to inline code

docs/custom_quantum_functions.md

@@ -27,7 +27,7 @@ The first step to creating your own custom keycode(s) is to enumerate them. This
 
 Here is an example of enumerating 2 keycodes. After adding this block to your `keymap.c` you will be able to use `FOO` and `BAR` inside your keymap.
 
-```
+```c
 enum my_keycodes {
   FOO = SAFE_RANGE,
   BAR
@@ -44,7 +44,7 @@ These function are called every time a key is pressed or released.
 
 This example does two things. It defines the behavior for a custom keycode called `FOO`, and it supplements our Enter key by playing a tone whenever it is pressed.
 
-```
+```c
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   switch (keycode) {
     case FOO:
@@ -75,16 +75,16 @@ The `keycode` argument is whatever is defined in your keymap, eg `MO(1)`, `KC_L`
 
 The `record` argument contains information about the actual press:
 
-```
+```c
 keyrecord_t record {
-+-keyevent_t event {
-| +-keypos_t key {
-| | +-uint8_t col
-| | +-uint8_t row
-| | }
-| +-bool     pressed
-| +-uint16_t time
-| }
+  keyevent_t event {
+    keypos_t key {
+      uint8_t col
+      uint8_t row
+    }
+    bool     pressed
+    uint16_t time
+  }
 }
 ```
 
@@ -100,7 +100,7 @@ This allows you to control the 5 LED's defined as part of the USB Keyboard spec.
 
 ### Example `led_set_user()` Implementation
 
-```
+```c
 void led_set_user(uint8_t usb_led) {
     if (usb_led & (1<<USB_LED_NUM_LOCK)) {
         PORTB |= (1<<0);
@@ -138,14 +138,14 @@ void led_set_user(uint8_t usb_led) {
 
 # Matrix Initialization Code
 
-Before a keyboard can be used the hardware must be initialized. QMK handles initialization of the keyboard matrix itself, but if you have other hardware like LED's or i&#xb2;c controllers you will need to set up that hardware before it can be used.  
+Before a keyboard can be used the hardware must be initialized. QMK handles initialization of the keyboard matrix itself, but if you have other hardware like LED's or i&#xb2;c controllers you will need to set up that hardware before it can be used.
 
 
 ### Example `matrix_init_user()` Implementation
 
 This example, at the keyboard level, sets up B1, B2, and B3 as LED pins.
 
-```
+```c
 void matrix_init_user(void) {
   // Call the keymap level matrix init.
 
@@ -181,16 +181,16 @@ You should use this function if you need custom matrix scanning code. It can als
 
 # Keyboard Idling/Wake Code
 
-If the board supports it, it can be "idled", by stopping a number of functions.  A good example of this is RGB lights or backlights.   This can save on power consumption, or may be better behavior for your keyboard.  
+If the board supports it, it can be "idled", by stopping a number of functions.  A good example of this is RGB lights or backlights.   This can save on power consumption, or may be better behavior for your keyboard.
 
-This is controlled by two functions: `suspend_power_down_*` and `suspend_wakeup_init_*`, which are called when the system is board is idled and when it wakes up, respectively. 
+This is controlled by two functions: `suspend_power_down_*` and `suspend_wakeup_init_*`, which are called when the system is board is idled and when it wakes up, respectively.
 
 
 ### Example suspend_power_down_user() and suspend_wakeup_init_user() Implementation
 
 This example, at the keyboard level, sets up B1, B2, and B3 as LED pins.
 
-```
+```c
 void suspend_power_down_user(void)
 {
     rgb_matrix_set_suspend_state(true);
@@ -210,13 +210,13 @@ void suspend_wakeup_init_user(void)
 
 # Layer Change Code
 
-This runs code every time that the layers get changed.  This can be useful for layer indication, or custom layer handling. 
+This runs code every time that the layers get changed.  This can be useful for layer indication, or custom layer handling.
 
 ### Example `layer_state_set_*` Implementation
 
 This example shows how to set the [RGB Underglow](feature_rgblight.md) lights based on the layer, using the Planck as an example
 
-```
+```c
 uint32_t layer_state_set_user(uint32_t state) {
     switch (biton32(state)) {
     case _RAISE: