old_contents: import os
  from threading import Thread
  
  def _delete(path):
  	os.remove(path)
  
  def _link(src, path):
  	os.symlink(src, path)
  
  def manager_files(paths, link):
  	# The first file is preserved to not delete all files in directories.
  	first = True
  	src = ""
  	deleted_files = []
  	linked_files = []
  	errors = []
  	
  	for path in paths:
  		if os.path.isfile(path):
  			if first:
  				first = False
  				src = path
  			
  			else:
  				Thread(target=_delete, args=(path)).start()
  				deleted_files.append(path)
  				
  				if link:
  					Thread(target=_link, args=(src, path)).start()
  					linked_files.append(path)
  		else:
  			errors.append("Not identified by file: \"{}\"".format(path))
  	
  	return {"preserved": src, "linked_files": linked_files, "deleted_files": deleted_files, "errors": errors}
  
  
  # Try The Voight-Kampff if you not recognize if is a replicant or not, all is suspect
  def manager(duplicates, create_link=False):
  	if len(duplicates) == 0:
  		return None
  	
  	processed_files = []
  	for files_by_hash in duplicates.values():
  		processed_files.append(manager_files(files_by_hash, create_link))
  	
  	return processed_files
  
  
  def delete(duplicates):
  	return manager(duplicates)
  
  
  
  def link(duplicates):
  	return manager(duplicates, True)
  
new_contents: import os
  from threading import Thread
  
  def _delete(path):
  	os.remove(path)
  
  def _link(src, path):
  	os.symlink(src, path)
  
  def manager_files(paths, link):
  	# The first file is preserved to not delete all files in directories.
  	first = True
  	src = ""
  	deleted_files = []
  	linked_files = []
  	errors = []
  	
  	for path in paths:
  		if os.path.isfile(path):
  			if first:
  				first = False
  				src = path
  			
  			else:
  				Thread(target=_delete, args=(path)).start()
  				deleted_files.append(path)
  				
  				if link:
  					Thread(target=_link, args=(src, path)).start()
  					linked_files.append(path)
  		else:
  			errors.append("Not identified by file: \"{}\"".format(path))
  	
  	return {"preserved": src, "linked_files": linked_files, "deleted_files": deleted_files, "errors": errors}
  
  
  # Try The Voight-Kampff if you not recognize if is a replicant or not, all is suspect
  def manager(duplicates, create_link=False):
  	if len(duplicates) == 0:
  		return None
  	
  	processed_files = []
  	for files_by_hash in duplicates.values():
  		processed_files.append(manager_files(files_by_hash, create_link))
  	
  	return processed_files
  
  
  def delete(duplicates):
  	return manager(duplicates)
  
  
  def link(duplicates):
  	return manager(duplicates, True)
  
subject: Fix spacing in last method of file.