format files

src/219.c

@@ -29,4 +29,4 @@ int main()
     assert(containsNearbyDuplicate(nums2, sizeof(nums2) / sizeof(int), 1) == true);
     int nums3[] = {1, 2, 3, 1, 2, 3};
     assert(containsNearbyDuplicate(nums3, sizeof(nums3) / sizeof(int), 2) == false);
-}
+}