Is relying on Demorgan's law in open-source code a barrier to contribution?

I recently added this code to a Github project I'm working on:

    if not initial_push=='y' and not initial_push=='yes':
        print('Aborting.')
        return False

Since this is a public repository that I'm hoping people will contribute to, I am considering refactoring that bit as the slightly more readable code:

    if initial_push=='y' or initial_push=='yes':
        pass
    else:
        print('Aborting.')
        return False

If my goal is to keep the open-source project accessible to outside contribution then should I use the more readable but clumsy second method? I am actually interested in the answer for the general case, not just this specific example.