lib/format/markdown.js
function suiteHeader(name, depth) {
  if (depth === -1) {
    return "# " + serializeName(name) + "\n\n";
  }
  return "## " + indent(depth) + serializeName(name) + "\n\n";
}
function suiteHeader(name, depth) {
  if (depth === -1) {
    return "# " + serializeName(name) + "\n\n";
  }
  return "## " + indent(depth) + serializeName(name) + "\n\n";
}
suiteHeader serializes suite header.

@param {string} name Suite name.
@param {number} depth Suite depth.
@returns Serialized suite header.