HTML in localized string

I noticed verbatim HTML instead of a link in a rendered page:
`'coll-return_to_collection'       => '<p>Return to <a href="$1">$2</a></p>',`
This works: (partly, the linked page appears as a redlink still)
`'coll-return_to_collection'       => 'Return to [[$2]]',`
Kind regards
