In Illustrator, I have a saved artwork, then I'm saving a copy as PDF, as usual.
After I keep the AI file open, making some modifications which I don't want to save, so I close the file and click "Don't Save".
Even though I clicked that, the file's modification time is changing.
(The modifications I made are not there, so it's not really saving but why the date is changing then?)
Please find the cause of it! Thank you!