resolves #298 don't set the relfileprefix attribute on GitHub
resolves #298 don't set the relfileprefix attribute on GitHub

asciidoctor/asciidoctor-pdf,dsisnero/asciidoctor-pdf,asciidoctor/asciidoctor-pdf,mojavelinux/asciidoctor-pdf,mojavelinux/asciidoctor-pdf,dsisnero/asciidoctor-pdf,Hextremist/asciidoctor-pdf,Hextremist/asciidoctor-pdf