# File lib/rubygems/installer_test_case.rb, line 98
  def util_make_exec(spec = @spec, shebang = "#!/usr/bin/ruby")
    spec.executables = %w[executable]
    spec.files << 'bin/executable'

    exec_path = spec.bin_file "executable"
    write_file exec_path do |io|
      io.puts shebang
    end

    bin_path = File.join @tempdir, "bin", "executable"
    write_file bin_path do |io|
      io.puts shebang
    end
  end