read section numbering max depth from asciidoc-numbered PI
read section numbering max depth from asciidoc-numbered PI

asciidoctor/asciidoctor-fopub,getreu/asciidoctor-fopub,getreu/asciidoctor-fopub,asciidoctor/asciidoctor-fopub,asciidoctor/asciidoctor-fopub,getreu/asciidoctor-fopub