add conum class to b element when icons are disabled
add conum class to b element when icons are disabled

cuit-zhaxin/asciidoctor,benignbala/asciidoctor,neontapir/asciidoctor,yukisan/asciidoctor,yukisan/asciidoctor,glamouracademy/asciidoctor,pepijnve/asciidoctor,cuit-zhaxin/asciidoctor,pepijnve/asciidoctor,anthonny/asciidoctor,mjang/mj-asciidoc,anthonny/asciidoctor,gjtorikian/asciidoctor,asciidocfx/asciidoctor,neontapir/asciidoctor,benignbala/asciidoctor,asciidocfx/asciidoctor,mjang/mj-asciidoc,glamouracademy/asciidoctor,gjtorikian/asciidoctor