Merge pull request #519 from nekr0z/518

fix(function): error with newer Hugo versions

layouts/partials/function/content.html

@@ -1,5 +1,7 @@
 {{- $content := .Content -}}
 
+{{- if ne "" $content -}}
+
 {{- if .Ruby -}}
     {{- $content = partial "function/ruby.html" $content -}}
 {{- end -}}
@@ -16,4 +18,6 @@
 
 {{- $content = partial "function/escape.html" $content -}}
 
+{{- end -}}
+
 {{- return $content -}}