add Sarah White as contributor
add Sarah White as contributor

also cleanup spacing

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