Are you sure? The default argument passed to the function is False.

Are you sure? The default argument passed to the function is False.

My Python isn't good but it seems if something is False it's not None.

>>> reverse = False
>>> if reverse is None: print('yes')
... 
>>> reverse = True
>>> if reverse is None: print('yes')
... 
>>> reverse = None
>>> if reverse is None: print('yes')
... 
yes
>>> 

So basically the current test doesn't make sense because reverse is never "None". It's either True or False.

It is None if the input comes from reST. And the -1 argument makes stuff reversed. I fixed it in commit 2cb25fb.