Emails from the plugin looks now like:
A new version of Mail On Update is available.
- Installed: 5.1.0, Current: 5.2.1
A new version of Wordfence Security is available.
- Installed: 3.6.9, Current: 3.7.2
A new version of WP CleanFix is available.
- Installed: 3.0.1, Current: 3.0.2
It would be nice if that email could include changelog between versions.