fix: fix formatting issue while using nested toc shortcodes (#415)

exampleSite/content/en/shortcodes/toc.md

@@ -4,12 +4,22 @@ title: ToC
 
 Simple wrapper to generate a page Table of Content from a shortcode.
 
+**Attributes:**
+
+| Name   | Usage                      | Default                                                       |
+| ------ | -------------------------- | ------------------------------------------------------------- |
+| format | format of the returned ToC | <!-- spellchecker-disable -->html<!-- spellchecker-enable --> |
+
+**Syntax:**
+
 <!-- prettier-ignore-start -->
 ```tpl
-{{</* toc */>}}
+{{</* toc (format=[html|raw]) */>}}
 ```
 <!-- prettier-ignore-end -->
 
+**Example:**
+
 {{< toc >}}
 
 ## Level 1