Mark posts with a `canonical_url` as a `repost-of`
As per #521 (closed), anything with a canonical_url
would be a repost of the other content. We should automate this as part of the site design.
Plus, add an HTMLProofer test
As per #521 (closed), anything with a canonical_url
would be a repost of the other content. We should automate this as part of the site design.
Plus, add an HTMLProofer test