fix: ignore quote in summary reference ids

[rdlopes]

Hi all, I was generating documentation in French language and quotes appear quite often in titles.

Problem is that quotes don't play well with asciidoctor unique ids.

I remember having applied such a fix to feature ids, but never did on summary references.

So, to avoid the problem, I've applied the same rule of thumb:

• ids don't contain special characters
• asciidoc links from references or cross links should be labeled

For instance:

• Feature One failing scenario becomes link <<One-failing-scenario,One failing scenario>>
• Feature Accéder à l'application becomes link <<Accéder-à-l-application,Accéder à l'application>>

Here's the fix that reflects on this issue.

PS: my IntelliJ keeps complaining that there are empty quotes, resulting in performance loss. So I also removed them from where I changed code.