whole_func_string: function(text) {
          if (!text || !text.replace) return text
          return text.replace(/(&[#a-zA-Z0-9]+;)/g, function (m, s) {
              return _convertEntity(s)
          })
      }
func_code_string: function(text) {
          if (!text || !text.replace) return text
          return text.replace(/(&[#a-zA-Z0-9]+;)/g, function (m, s) {
              return _convertEntity(s)
          })
      }
func_documentation_string: Covert HTML entities
  @doc http://www.w3school.com.cn/tags/html_ref_entities.html