function report (what, value)
  print(string.format('%16s: %s', what, value))
end
report('# input files', #PANDOC_STATE.input_files)
report('output file', PANDOC_STATE.output_file)
report('# request header', #PANDOC_STATE.request_headers)
report('resource path', table.concat(PANDOC_STATE.resource_path, ', '))
report('source URL', PANDOC_STATE.source_url)
report('user data dir', PANDOC_STATE.user_data_dir and 'defined' or 'unset')
report('trace', PANDOC_STATE.trace)
report('verbosity', PANDOC_STATE.verbosity)