# File lib/rspec/expectations/deprecation.rb, line 7
      def deprecate(method, alternate_method=nil, version=nil)
        version_string = version ? "rspec-#{version}" : "a future version of RSpec"

        message = "\n*****************************************************************\nDEPRECATION WARNING: you are using deprecated behaviour that will\nbe removed from \#{version_string}.\n\n\#{caller(0)[2]}\n\n* \#{method} is deprecated.\n"
      if alternate_method
        message << "* please use \#{alternate_method} instead.\n"
      end

        message << "*****************************************************************"
        warn_deprecation(message)
      end