fix margin below list content in admonition block; remove a > code hack
fix margin below list content in admonition block; remove a > code hack

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