Use Hugo's partial-returning where possible

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

layouts/_partials/nameinseries.html

@@ -1,8 +1,8 @@
 {{- $term := index (.page.GetTerms "series") 0 -}}
 {{- $divider := $term.Params.divider -}}
+{{- $name := .page.Title -}}
 {{- if (and $divider (strings.Contains .page.Title $divider)) -}}
 {{- $rest := after 1 (split .page.Title $divider) -}}
-{{- .scratch.Set "name" (delimit $rest $divider) -}}
-{{- else -}}
-{{- .scratch.Set "name" .page.Title -}}
+{{- $name = delimit $rest $divider -}}
 {{- end -}}
+{{- return $name -}}