website/static/markdown.js/formatMarkdown
  function formatMarkdown(
    input,
    output,
    output2,
    version,
    url,
    options,
    cliOptions,
    full
  ) {
    var syntax = getMarkdownSyntax(options);
    var optionsString = formatCLIOptions(cliOptions);
    var isIdempotent = output2 === "" || output === output2;

    return [
      "**Prettier " + version + "**",
      "[Playground link](" + url + ")",
      optionsString === "" ? null : codeBlock(optionsString, "sh"),
      "",
      "**Input:**",
      codeBlock(input, syntax),
      "",
      "**Output:**",
      codeBlock(output, syntax)
    ]
      .concat(
        isIdempotent
          ? []
          : ["", "**Second Output:**", codeBlock(output2, syntax)]
      )
      .concat(full ? ["", "**Expected behavior:**", ""] : [])
      .filter(function(part) {
        return part != null;
      })
      .join("\n");
  }