content: Consolidate configuration documentation

layouts/shortcodes/include.html

@@ -5,17 +5,15 @@ Renders the page using the RenderShortcode method on the Page object.
 You must call this shortcode using the {{% %}} notation.
 
 @param {string} (positional parameter 0) The path to the page, relative to the content directory.
-@returns template.HTML
 
 @example {{% include "functions/_common/glob-patterns" %}}
-*/}}
+*/ -}}
 {{/* prettier-ignore-end */ -}}
 {{- with .Get 0 }}
   {{- with or ($.Page.GetPage .) (site.GetPage .) }}
     {{- .RenderShortcodes }}
   {{- else }}
-    {{/* TODO1 make error */}}
-    {{- warnf "The %q shortcode was unable to find %q. See %s" $.Name . $.Position }}
+    {{- errorf "The %q shortcode was unable to find %q. See %s" $.Name . $.Position }}
   {{- end }}
 {{- else }}
   {{- errorf "The %q shortcode requires a positional parameter indicating the path of the file to include. See %s" .Name .Position }}