code: function link(token, meta) {
    var text = token.text;
    if(!meta.base || !meta.hash) return anchor(
      text, '#' + gfm(text) + (token.suffix || ''));
    var href = hash(token, base);
    return anchor(text, href);
  }
docs: @func link(token, base)
  
  Create a toc link.
  
  @param token The lexer token.
  @param base A base url to prefix to the href.
  
  @return The token text wrapped in a link.