old_contents: import subprocess
  import os
  
  vale = os.path.abspath(os.path.join("..", "docs", "bin", "vale"))
  
  
  def main(extends):
      """return an example for the given Vale extension point.
      """
      example = subprocess.check_output([vale, "new", extends])
      return example.decode("utf-8").strip()
  
new_contents: import subprocess
  import os
  
  vale = os.path.abspath(os.path.join("..", "docs", "bin", "vale"))
  
  
  def main(extends):
      """return an example for the given Vale extension point.
      """
      example = subprocess.check_output([vale, "new-rule", extends])
      return example.decode("utf-8").strip()
  
subject: update directives