failure_message_for_should_not

# File lib/spec/matchers/be.rb, line 102
      def failure_message_for_should_not
        message = "'should_not be \#{@operator} \#{@expected}' not only FAILED,\nit is a bit confusing.\n"
          
        raise message << ([:===,:==].include?(@operator) ?
          "It might be more clearly expressed without the \"be\"?" :
          "It might be more clearly expressed in the positive?")
      end