whole_func_string: function linkTag(args, content) {
    let url = '';
    const text = [];
    let external = false;
    let title = '';
    let i = 0;
    const len = args.length;
  
    // Find link URL and text
    for (; i < len; i++) {
      const item = args[i];
  
      if (rUrl.test(item)) {
        url = item;
        break;
      } else {
        text.push(item);
      }
    }
  
    // Delete link URL and text from arguments
    args = args.slice(i + 1);
  
    // Check if the link should be open in a new window
    // and collect the last text as the link title
    if (args.length) {
      const shift = args[0];
  
      if (shift === 'true' || shift === 'false') {
        external = shift === 'true';
        args.shift();
      }
  
      title = args.join(' ');
    }
  
    const attrs = {
      href: url,
      title,
      target: external ? '_blank' : ''
    };
  
    return htmlTag('a', attrs, text.join(' '));
  }
func_code_string: function linkTag(args, content) {
    let url = '';
    const text = [];
    let external = false;
    let title = '';
    let i = 0;
    const len = args.length;
  
    // Find link URL and text
    for (; i < len; i++) {
      const item = args[i];
  
      if (rUrl.test(item)) {
        url = item;
        break;
      } else {
        text.push(item);
      }
    }
  
    // Delete link URL and text from arguments
    args = args.slice(i + 1);
  
    // Check if the link should be open in a new window
    // and collect the last text as the link title
    if (args.length) {
      const shift = args[0];
  
      if (shift === 'true' || shift === 'false') {
        external = shift === 'true';
        args.shift();
      }
  
      title = args.join(' ');
    }
  
    const attrs = {
      href: url,
      title,
      target: external ? '_blank' : ''
    };
  
    return htmlTag('a', attrs, text.join(' '));
  }
func_documentation_string: Link tag
  
  Syntax:
  {% link text url [external] [title] %}