Showing the paper URL and snapshot is fantastic, but it would also be helpful to know how the metadata actually changed to verify that the change is worth accepting.

Brainstorming how this might work:

1. If the title has changed, list both old and new titles, highlighting the differences.
2. If the author list has changed:
   2.1 Render the author list as a string by separating authors with commas, and for any name containing spaces in the first and/or last part, use 3 spaces rather than 1 to separate the two parts so the boundary is unambiguous.
   2.2 If author names have changed at all, including adding or removing authors, print both old and new author lists, highlighting the diff. If the author names have not changed, only their order, list the change as "Corrected author order:" and the updated string. That is easy to check against the PDF snapshot.
   2.3 If author affiliations have changed, do we want to review them? They are not actually exposed in the site at all.
3. If the abstract has changed: printing both old and new abstracts might be too much clutter. Is there a compact way to show only their diff?