Nice moment in Slack and Medium – when logging in, the login code that arrives via email is already there in the subject, in addition to hiding inside:

This feels good for two reasons. One is the obvious one: you see the code earlier, it might show up in a notification, etc.

But also, this should prevent multiple login codes to be threaded as a “conversation” inside your email client, since threading is based on the email subject – and threaded utility emails can be really confusing.