code: def update_file(filename, result, content, indent):
      
      # Split the file into frontmatter and content
      parts = re.split('---+', content, 2)
  
      # Load the frontmatter into an object
      frontmatter = yaml.safe_load(parts[1])
  
      # Add the counts entry in the results object to the frontmatter
      frontmatter['counts'] = result['counts']
  
      # Set the frontmatter part backed to the stringified version of the
      # frontmatter object
      parts[1] = '\n{}'.format(
          yaml.safe_dump(frontmatter, default_flow_style=False, indent=indent))
      result = '---'.join(parts)
  
      # Write everything back to the file
      with open(filename, 'wb') as f:
          f.write(result.encode('utf-8'))
      print('{} updated.'.format(filename))
docs: Updates a Jekyll file to contain the counts form an object
  
      This just converts the results to YAML and adds to the Jekyll frontmatter.
  
      Args:
          filename: the Jekyll file to update
          result: the results object from `wc`
          content: the contents of the original file
          indent: the indentation level for dumping YAML