put error class after error message in cli output
put error class after error message in cli output

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