consolidate logic in kbd converter for DocBook
consolidate logic in kbd converter for DocBook

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