Tighten up list item level tracking in #build_ulist
Tighten up list item level tracking in #build_ulist

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