Add spacing to WorldWideOrganisation descriptions

Fixes an issue where the description of people that was being generated
by the WorldWideOrganisationPresenter was not adding spacing between
multiple roles. Fixed the issue and added test cases.

app/presenters/worldwide_organisation_presenter.rb

@@ -51,7 +51,7 @@ def person_in_primary_role
       href: person["web_url"],
       image_url: person["details"]["image"]["url"],
       image_alt: person["details"]["image"]["alt_text"],
-      description: current_roles.map { |role_app| role_app.dig("links", "role").first["title"] }.join,
+      description: current_roles.map { |role_app| role_app.dig("links", "role").first["title"] }.join(", "),
     }
   end
 
@@ -67,7 +67,7 @@ def people_in_non_primary_roles
       {
         name: person["title"],
         href: person["web_url"],
-        description: current_roles.map { |role_app| role_app.dig("links", "role").first["title"] }.join,
+        description: current_roles.map { |role_app| role_app.dig("links", "role").first["title"] }.join(", "),
       }
     end
   end

test/presenters/worldwide_organisation_presenter_test.rb

@@ -5,6 +5,16 @@ def schema_name
     "worldwide_organisation"
   end
 
+  test "description of primary_role_person should have spaces between roles" do
+    presenter = create_presenter(WorldwideOrganisationPresenter, content_item: { "links" => { "primary_role_person" => [{ "details" => { "image" => {} }, "links" => { "role_appointments" => [{ "details" => { "current" => true }, "links" => { "role" => [{ "title" => "Example Role 1" }] } }, { "details" => { "current" => true }, "links" => { "role" => [{ "title" => "Example Role 2" }] } }] } }] } })
+    assert_equal "Example Role 1, Example Role 2", presenter.person_in_primary_role[:description]
+  end
+
+  test "description of people_in_non_primary_roles should have spaces between roles" do
+    presenter = create_presenter(WorldwideOrganisationPresenter, content_item: { "links" => { "secondary_role_person" => [{ "details" => { "image" => {} }, "links" => { "role_appointments" => [{ "details" => { "current" => true }, "links" => { "role" => [{ "title" => "Example Role 1" }] } }, { "details" => { "current" => true }, "links" => { "role" => [{ "title" => "Example Role 2" }] } }] } }] } })
+    assert_equal "Example Role 1, Example Role 2", presenter.people_in_non_primary_roles.first[:description]
+  end
+
   test "#title returns the title" do
     assert_equal schema_item["title"], presented_item.title
   end