Code editting : mm_per_sec_per_sec become acceleration_mm_per_sec_per_sec in motor setter

motor.h

@@ -84,13 +84,13 @@ public:
         return (stepper.speed() != 0);
     }
 
-    void set_accel_mm_per_sec_per_sec (float mm_per_sec_per_sec)
+    void set_accel_mm_per_sec_per_sec (float acceleration_mm_per_sec_per_sec)
     {
-        if (mm_per_sec_per_sec == 0)
-            mm_per_sec_per_sec = 1000;
-        _acceleration_mm_per_sec_per_sec = mm_per_sec_per_sec;
+        if (acceleration_mm_per_sec_per_sec == 0)
+            acceleration_mm_per_sec_per_sec = 1000;
+        _acceleration_mm_per_sec_per_sec = acceleration_mm_per_sec_per_sec;
 #if !CORE_MOCK
-        stepper.setAcceleration(mm_to_step(mm_per_sec_per_sec));
+        stepper.setAcceleration(mm_to_step(acceleration_mm_per_sec_per_sec));
 #endif
     }