Adding a missing test for #291
Adding a missing test for #291

You already had this fixed, though you didn't have a test that covered
it in options

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