Issue with the feature that avoids links with the same ID

[javiereguiluz]

The #152 fix works beautifully ... but there's something missing in it. The TOC links seems to be not updated.

Example:

• in the TOC: https://symfony.com/doc/current/components/string.html#slugger
• in the body: https://symfony.com/doc/current/components/string.html#slugger-1

Thanks

[wouterj]

I would also suggest not suffixing the first ID and only start suffixing on the first duplicate.

That keeps URLs tidy and preserves BC with any old links.

[javiereguiluz]

I'm working on this and I hope to submit a fix soon.