Fix parsing of nested slices in resolve-refs and resolve-allof partials (#2069)

Signed-off-by: Kévin Commaille <zecakeh@tedomum.fr>

changelogs/internal/newsfragments/2069.clarification

@@ -0,0 +1 @@
+Fix parsing of nested slices in `resolve-refs` and `resolve-allof` partials.

layouts/partials/json-schema/resolve-allof.html

@@ -24,6 +24,14 @@
 
     {{ range $original }}
         {{ $resolved := partial "json-schema/resolve-allof" . }}
+        {{ if reflect.IsSlice $resolved }}
+          {{/*
+              If $resolved is a slice, `append` will add the items of $resolved to
+              $ret, but we want to add $resolved itself to $ret, so we always wrap
+              it into another slice.
+          */}}
+          {{ $resolved = slice $resolved }}
+        {{ end }}
         {{ $ret = $ret | append $resolved }}
     {{ end }}
 {{ else if reflect.IsMap $original }}

layouts/partials/json-schema/resolve-refs.html

@@ -69,6 +69,14 @@
 
     {{ range $schema }}
         {{ $resolved := partial "json-schema/resolve-refs" (dict "schema" . "path" $path) }}
+        {{ if reflect.IsSlice $resolved }}
+            {{/*
+                If $resolved is a slice, `append` will add the items of $resolved to
+                $result_slice, but we want to add $resolved itself to $result_slice,
+                so we wrap it into another slice.
+            */}}
+            {{ $resolved = slice $resolved }}
+        {{ end }}
         {{ $result_slice = $result_slice | append $resolved }}
     {{ end }}