docs: function loadFile(filename, level, threshold) {
    var out = [];
    var file;
  
    out.push('<!-- BEGIN DOC-COMMENT H' + level + ' ' + filename + ' -->\n');
  
    try {
      file = fs.readFileSync(filename, {encoding: 'utf-8'});
      out.push(srcToMarkdown(file, level, threshold));
    } catch (e) {
      // I don't see how we can relay this error safely
    }
  
    out.push('<!-- END DOC-COMMENT -->');
  
    return out.join('');
  }