Change external asciidoctor tool to embeded mode (#8677)

Ref #8676

* add the `-e` flag for embedded mode
* add a level offset to include the title of the document

diff --git a/docs/content/doc/advanced/external-renderers.en-us.md b/docs/content/doc/advanced/external-renderers.en-us.md
index e3a122448d5b1a957e354aeba44d6f7bfa45c365..a14f344e63b89ae68c36f9baadaeb4ef2bf9db78 100644 (file)
--- a/docs/content/doc/advanced/external-renderers.en-us.md
+++ b/docs/content/doc/advanced/external-renderers.en-us.md
@@ -51,7 +51,7 @@ add one `[markup.XXXXX]` section per external renderer on your custom `app.ini`:
 [markup.asciidoc]
 ENABLED = true
 FILE_EXTENSIONS = .adoc,.asciidoc
-RENDER_COMMAND = "asciidoctor --out-file=- -"
+RENDER_COMMAND = "asciidoctor -e -a leveloffset=-1 --out-file=- -"
 ; Input is not a standard input but a file
 IS_INPUT_FILE = false