# File lib/matchy/built_in/truth_expectations.rb, line 12
      def be(*obj)
        build_matcher(:be, obj) do |receiver, matcher, args|
          @receiver, expected = receiver, args[0]
          matcher.positive_failure_message = "Expected #{@receiver.inspect} to be #{expected.inspect}."
          matcher.negative_failure_message = "Expected #{@receiver.inspect} to not be #{expected.inspect}."
          expected == @receiver
        end
      end