docs: def find_all_files(self):
  		"""
  		Find files including those in subrepositories.
  		"""
  		files = self.find_files()
  		subrepo_files = (
  			posixpath.join(subrepo.location, filename)
  			for subrepo in self.subrepos()
  			for filename in subrepo.find_files()
  		)
  		return itertools.chain(files, subrepo_files)