SubpagesWithSummaries should avoid broken anchors and self links

[Josh-Cena]

What information was incorrect, unhelpful, or incomplete?

Take a look at https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Reference/Attributes. For the aria-label entry, the link to "prohibit naming" is broken because it's #associated_roles, where the anchor is valid on the aria-label page but invalid when transcluded.

Also, if the link points to the landing page, then it would be rendered as a self-link

What did you expect to see?

When transcluding content, anchors should be expanded to full paths to make them stay valid. Self-links should be removed.

Do you have any supporting links, references, or citations?

No response

Do you have anything more you want to share?

No response