In How can I do the work of Universal USB Installer from Linux?, I received the following email notification for the first comment, with a linked URL ending three characters too early:
The link displays correctly, and links correctly when I load the question, but clicking on the email took me to http://linuxmint-installation-guide.readthedocs.io/en/latest/burn.h, which was a 404.
I believe this is a defect in URL recognition in email updates.