def truncated_error
      e = @content.is_a?(String) ? @content : @content.inspect
      e = e[0, MAX_ERROR_SIZE - 3] + "..." if e.size > (MAX_ERROR_SIZE - 3)
      e
    end
def truncated_error
      e = @content.is_a?(String) ? @content : @content.inspect
      e = e[0, MAX_ERROR_SIZE - 3] + "..." if e.size > (MAX_ERROR_SIZE - 3)
      e
    end
Limited length error string

 === Return
 e(String):: String of no more than MAX_ERROR_SIZE characters