don't dup on peek_line; cleanup comments
don't dup on peek_line; cleanup comments

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