Thus you can say `papersize: a4` and the latex will contain `a4paper`. This change may break some existing workflows; if you currently specify `a4paper`, you'll get `a4paperpaper` which is meaningless. However, the change seems worth it, as it will make the `papersize` variable work uniformly across ConTeXt, LaTeX, and html->pdf via wkhtmltopdf. See https://github.com/jgm/pandoc/commit/3861df510c45ecfc0ac9581dc6f16b07eac4a 62d#commitcomment-15135193