docs: function getRegExpTags(opt, fileUrl) {
  	function parseTag(tag, replacement) {
  		return new RegExp(escapeStringRegexp(tag).replace(PATH_REGEX, replacement || FILE_PATH_REGEX), 'g');
  	}
  
  	if (fileUrl) {
  		return {
  			start: parseTag(opt.start, fileUrl),
  			end: parseTag(opt.end, fileUrl)
  		}
  	}
  	return {
  		start: parseTag(opt.start),
  		startex: parseTag(opt.start, "(.+)"),
  		end: parseTag(opt.end)
  	}
  }