docs: def build_link(href, text, cls=None, icon_class=None, **attrs):
      """Builds an html link.
  
      :param href: link for the anchor element
      :param text: text for the anchor element
      :param attrs: other attribute kwargs
  
      >>> build_link('xyz.com', 'hello', 'big')
      u'<a href="xyz.com" class="big">hello</a>'
      >>> build_link('xyz.com', 'hello', 'big', 'fa fa-times')
      u'<a href="xyz.com" class="big"><i class="fa fa-times"></i> hello</a>'
      """
      return build_html_element(tag='a',
                                text=text,
                                href=href,
                                cls=cls,
                                icon_class=icon_class,
                                **attrs)