FILRUNOUT => FIL_RUNOUT

Marlin/Conditionals.h

   #define HAS_SERVO_2 (PIN_EXISTS(SERVO2))
   #define HAS_SERVO_3 (PIN_EXISTS(SERVO3))
   #define HAS_FILAMENT_WIDTH_SENSOR (PIN_EXISTS(FILWIDTH))
-  #define HAS_FILRUNOUT (PIN_EXISTS(FILRUNOUT))
+  #define HAS_FIL_RUNOUT (PIN_EXISTS(FIL_RUNOUT))
   #define HAS_HOME (PIN_EXISTS(HOME))
   #define HAS_KILL (PIN_EXISTS(KILL))
   #define HAS_SUICIDE (PIN_EXISTS(SUICIDE))

Marlin/Marlin_main.cpp

 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
 
   void setup_filrunoutpin() {
-    pinMode(FILRUNOUT_PIN, INPUT);
+    pinMode(FIL_RUNOUT_PIN, INPUT);
     #if ENABLED(ENDSTOPPULLUP_FIL_RUNOUT)
-      WRITE(FILRUNOUT_PIN, HIGH);
+      WRITE(FIL_RUNOUT_PIN, HIGH);
     #endif
   }
 
 void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
 
   #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-    if (IS_SD_PRINTING && !(READ(FILRUNOUT_PIN) ^ FIL_RUNOUT_INVERTING))
+    if (IS_SD_PRINTING && !(READ(FIL_RUNOUT_PIN) ^ FIL_RUNOUT_INVERTING))
       handle_filament_runout();
   #endif
 

Marlin/SanityCheck.h

  * Filament Runout needs a pin and SD Support
  */
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  #if !HAS_FILRUNOUT
-    #error "FILAMENT_RUNOUT_SENSOR requires FILRUNOUT_PIN."
+  #if !HAS_FIL_RUNOUT
+    #error "FILAMENT_RUNOUT_SENSOR requires FIL_RUNOUT_PIN."
   #elif DISABLED(SDSUPPORT)
     #error "FILAMENT_RUNOUT_SENSOR requires SDSUPPORT."
   #endif

Marlin/pins_CNCONTROLS_12.h

 //common I/O
 
  //#define TEMP_CHAMBER_PIN        13  // ANALOG INPUT !!
- #define FILRUNOUT_PIN             18
+ #define FIL_RUNOUT_PIN            18
  //#define PWM_1_PIN               12
  //#define PWM_2_PIN               13 
  //#define SPARE_IO                17  

Marlin/pins_RAMPS_14.h

 #endif
 
 // define digital pin 4 for the filament runout sensor. Use the RAMPS 1.4 digital input 4 on the servos connector
-#define FILRUNOUT_PIN       4
+#define FIL_RUNOUT_PIN      4
 
 #if MB(RAMPS_14_EFF) || MB(RAMPS_13_EFF) || ENABLED(IS_RAMPS_EFB)
   #define FAN_PIN           9 // (Sprinter config)