Asciidoc version 8.6.3 is a requirement together with whatever dependencies it needs and specifically docbook, w3m, fop and graphviz.
To build the documentation, use:
mvn clean install
To perform a faster check of the document structure and to see if snippets and images are correctly resolved, use:
mvn clean compile -Dcheck
which will only produce html for offline use and text outputs (including the manpages).
Note that this profile can’t be used together with the