MHRA doc formats have pluralised URLs
MHRA doc formats have pluralised URLs

MHRA doc formats are singular in the frontend, but need to be plural in
the editor.

ministryofjustice/specialist-publisher,alphagov/specialist-publisher,alphagov/specialist-publisher-rebuild,ministryofjustice/specialist-publisher,ministryofjustice/specialist-publisher,alphagov/manuals-publisher,ministryofjustice/specialist-publisher,alphagov/specialist-publisher,alphagov/specialist-publisher-rebuild,alphagov/manuals-publisher,alphagov/manuals-publisher,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher