Error checking if a section is a quiz

[SamyPesse]

This section is not a quiz according to gitbook:

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Here's a quiz about Gitbook

What does Gitbook support?
- [x] Table-based questions with radio buttons
- [x] Table-based questions with checkboxes
- [ ] Telepathy
- [x] List-based questions with checkboxes
- [x] List-based questions with radio buttons
- [ ] Moon-on-a-stick

> Gitbook supports table and list based quiz questions using either radio buttons or checkboxes.
>
> Gitbook is not telepathic and does not give you the moon on a stick.

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I think the error come from: https://github.com/GitbookIO/gitbook/blob/master/lib/parse/lex.js#L59 it should be a || instead of &&.

@mrpotes ?