/*
Gets remark of an AST

@param {Node} ast
@param {string} yaml

@returns {string}
function getNodeRemark(ast, yaml) {
  var index = getNodeEndMark(ast).pointer;
  while (index < yaml.length && yaml[index] !== '#' && yaml[index] !== _os.EOL) {
    ++index;
  }

  if (_os.EOL === yaml[index] || index === yaml.length) {
    return '';
  } else {
    while (index < yaml.length && (yaml[index] === '#' || yaml[index] === ' ')) {
      ++index;
    }
    var end = index;
    while (end < yaml.length && yaml[end] !== _os.EOL) {
      ++end;
    }
    return yaml.substring(index, end);
  }
}