code: def prepare_include(ctx, include, output):
      
      click.echo('chemdataextractor.dict.prepare_include')
      for i, line in enumerate(include):
          print('IN%s' % i)
          for tokens in _make_tokens(line.strip()):
              output.write(u' '.join(tokens))
              output.write(u'\n')
docs: Process and filter include file to produce list of names for dictionary.