mine/node_modules/normalize-package-data/lib/extract_description.js

module.exports = extractDescription

// Extracts description from contents of a readme file in markdown format
function extractDescription (d) {
  if (!d) return;
  if (d === "ERROR: No README data found!") return;
  // the first block of text before the first heading
  // that isn't the first line heading
  d = d.trim().split('\n')
  for (var s = 0; d[s] && d[s].trim().match(/^(#|$)/); s ++);
  var l = d.length
  for (var e = s + 1; e < l && d[e].trim(); e ++);
  return d.slice(s, e).join(' ').trim()
}