Put commas between enum values.

changelogs/client_server/newsfragments/1240.clarification

@@ -0,0 +1 @@
+Clarify enum values by separating possible values with commas.

layouts/partials/openapi/render-object-table.html

@@ -89,7 +89,7 @@
   <td>
     {{ if $required }}<strong>Required: </strong>{{end -}}
     {{ $property.description | markdownify -}}
-    {{ if eq $type "enum"}}<p>One of: <code>{{ $property.enum }}</code>.</p>{{ end -}}
+    {{ if eq $type "enum"}}<p>One of: <code>[{{ delimit $property.enum ", " }}]</code>.</p>{{ end -}}
     {{ if (index $property "x-addedInMatrixVersion") }}{{ partial "added-in" (dict "v" (index $property "x-addedInMatrixVersion")) }}{{ end -}}
     {{ if (index $property "x-changedInMatrixVersion") }}{{ partial "changed-in" (dict "changes_dict" (index $property "x-changedInMatrixVersion")) }}{{ end -}}
   </td>