# File lib/rspec/mocks/error_generator.rb, line 119
      def self.raise_double_negation_error(wrapped_expression)
        raise "Isn't life confusing enough? You've already set a " +
              "negative message expectation and now you are trying to " +
              "negate it again with `never`. What does an expression like " +
              "`#{wrapped_expression}.not_to receive(:msg).never` even mean?"
      end