updated demo function

csst_proto/some_other_modules.py

-def some_arbitrary_functions():
+def an_arbitrary_functions(*args):
     """ an arbitrary function """
     print("Hi, this is an arbitrary function.")
+    for _ in args:
+        print(_)

csst_proto/top_level_interface.py

 from .flip_image import flip_image, read_test_image
-from .some_other_modules import some_arbitrary_functions
+from .some_other_modules import an_arbitrary_functions
 
 
-__all__ = ["flip_image", "read_test_image", "some_arbitrary_functions"]
+__all__ = ["flip_image", "read_test_image", "an_arbitrary_functions"]