Documentation problem with file_save

Re-saving an existing file will not change its status.

I don't know, what this is supposed to mean. Changing the status with file_save() works fine, and the documentation of file_save_upload() even explicitly tells you to do so:

To make the file a permanent file, assign the status and use file_save() to save the changes.

Attached patch would delete this line. Otherwise, could someone explain to me what it should mean? Then we can perhaps make the docu clearer.