Mar 7
Mentions starting with four digits do not appear in the References.
If a string contains e.g., @1234 and is a scheduled task or a link to a Mail.app message, it is not displayed at all in References.
Tested on orange theme and plugins disabled.
Pending
Thanks for sharing this! This was disabled on purpose, the original reason was rather for `#`, because something like `#12` might not be a tag, but have the meaning "number 12". Will review this for `@` tags