fix typo in xmlnodes_at_path test helper
fix typo in xmlnodes_at_path test helper

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